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From: <timothee.lecomte@en...>  20070428 13:41:18

Timothée Lecomte wrote: > Dear Mojca, Joe, and all gnuplot enthusiasts, > > Here are some news about the availability of the wxt terminal for the > MacOS platform. I have had the chance to get my hands on my MacBook and I > have worked a little bit on the issues you got when trying to use the wxt > terminal. > > (...) > > So there is one remaining thing to try, but this will involve more work on > my part: changing the way wxt works on Unix and Mac and arrange it so that > the main thread runs the event loop while the usual gnuplot commandline > loop runs in the separate thread. The challenge is to do that only when > wxt_init() is called, not before (doing it at startup time is easy, but I > don't feel like it would be the right way). > (note that on Windows we don't have this problem because the fake terminal > already has the event loop and runs gnuplot command loop inside it) > (as far as aquaterm is concerned, it has another design again, something > like the X11 terminal: the GUI is in a different program with its own loop > and talking with gnuplot through some interprocess communication > mechanism) Hey people, here are some more news about "wxt on Mac". I've found some time yesterday to investigate a little further. I found that wxMac has some limitations :  the GUI thread (i.e. the one running the GUI event loop) has to be the main thread. I had some success making the second thread be the GUI one, but still a lot of issues come after that, because:  GUI calls should all be done in the same thread. With wxGTK, there's a mutex locking mechanism, but it seems that it's really not working on wxMac. So far, I was able to make wxt work by : at startup, first initialize wxWidgets create a second thread that run gnu_main (otherwise called main in plot.c) start the event loop in the main thread and use messages to tell the GUI event loop to do something, instead of doing it directly in the second thread. (it may seem very close to a two processscheme, such as what is done for the X11 terminal, but I don't want to have to deal with interprocess communication, or fork+exec for now ;) So, it's working ! The drawback is that there will be problems if, one day, we want to do, for example, a GTK terminal with a similar design... there may be some sort of clash between the two wanting for their main loop be in the main thread... but that day is probably quite far ! I'll be cleaning up the corresponding patch in the next days if I have some time again, and I'll send it to the list as soon as it's ready. Best regards, Timothée 
From: Ethan A Merritt <merritt@u.washington.edu>  20070426 06:16:30

On Wednesday 25 April 2007 21:42, Ethan A Merritt wrote: > On Wednesday 25 April 2007 20:04, Daniel J Sebald wrote: > > > > It looks like the declaration for inverse_normal_func() needs to be moved to > > before the first place it is called. > > Nonsense. There is a prototype for the function at the top of the file. Bleah. The prototype seems to have been deleted by mistake. Restored now. Ethan > Perhaps something went wrong with the definition of __PROTO during ./configure? > > Ethan > > > > > Dan > > > > > > ======== > > > > if gcc DHAVE_CONFIG_H I. I. I.. I../term I../term > > DBINDIR=\"/usr/local/bin\" DX11_DRIVER_DIR=\"/usr/local/libexec/gnuplot/4.3\" > > DGNUPLOT_PS_DIR=\"/usr/local/share/gnuplot/4.3/PostScript\" > > DCONTACT=\"gnuplotbugs@...\" > > DHELPFILE=\"/usr/local/share/gnuplot/4.3/gnuplot.gih\" DGNUPLOT_X11=\"`echo > > gnuplot_x11  sed 's,x,x,'`\" I/usr/X11R6/include I/usr/local/include > > I/usr/local/include g O2 MT specfun.o MD MP MF ".deps/specfun.Tpo" c o > > specfun.o specfun.c; \ > > then mv f ".deps/specfun.Tpo" ".deps/specfun.Po"; else rm f > > ".deps/specfun.Tpo"; exit 1; fi > > specfun.c:1094: error: conflicting types for 'inverse_normal_func' > > specfun.c:996: error: previous implicit declaration of 'inverse_normal_func' was > > here > > > >  > > This SF.net email is sponsored by DB2 Express > > Download DB2 Express C  the FREE version of DB2 express and take > > control of your XML. No limits. Just data. Click to get it now. > > http://sourceforge.net/powerbar/db2/ > > _______________________________________________ > > gnuplotbeta mailing list > > gnuplotbeta@... > > https://lists.sourceforge.net/lists/listinfo/gnuplotbeta > > >  Ethan A Merritt 
From: Ethan A Merritt <merritt@u.washington.edu>  20070426 04:42:46

On Wednesday 25 April 2007 20:04, Daniel J Sebald wrote: > > It looks like the declaration for inverse_normal_func() needs to be moved to > before the first place it is called. Nonsense. There is a prototype for the function at the top of the file. Perhaps something went wrong with the definition of __PROTO during ./configure? Ethan > > Dan > > > ======== > > if gcc DHAVE_CONFIG_H I. I. I.. I../term I../term > DBINDIR=\"/usr/local/bin\" DX11_DRIVER_DIR=\"/usr/local/libexec/gnuplot/4.3\" > DGNUPLOT_PS_DIR=\"/usr/local/share/gnuplot/4.3/PostScript\" > DCONTACT=\"gnuplotbugs@...\" > DHELPFILE=\"/usr/local/share/gnuplot/4.3/gnuplot.gih\" DGNUPLOT_X11=\"`echo > gnuplot_x11  sed 's,x,x,'`\" I/usr/X11R6/include I/usr/local/include > I/usr/local/include g O2 MT specfun.o MD MP MF ".deps/specfun.Tpo" c o > specfun.o specfun.c; \ > then mv f ".deps/specfun.Tpo" ".deps/specfun.Po"; else rm f > ".deps/specfun.Tpo"; exit 1; fi > specfun.c:1094: error: conflicting types for 'inverse_normal_func' > specfun.c:996: error: previous implicit declaration of 'inverse_normal_func' was > here > >  > This SF.net email is sponsored by DB2 Express > Download DB2 Express C  the FREE version of DB2 express and take > control of your XML. No limits. Just data. Click to get it now. > http://sourceforge.net/powerbar/db2/ > _______________________________________________ > gnuplotbeta mailing list > gnuplotbeta@... > https://lists.sourceforge.net/lists/listinfo/gnuplotbeta >  Ethan A Merritt 
From: Daniel J Sebald <daniel.sebald@ie...>  20070426 03:04:57

The following address in ChangeLog is undeliverable: Host vanzandt.comcast.net not found. ======== James, It looks like the declaration for inverse_normal_func() needs to be moved to before the first place it is called. Dan ======== if gcc DHAVE_CONFIG_H I. I. I.. I../term I../term DBINDIR=\"/usr/local/bin\" DX11_DRIVER_DIR=\"/usr/local/libexec/gnuplot/4.3\" DGNUPLOT_PS_DIR=\"/usr/local/share/gnuplot/4.3/PostScript\" DCONTACT=\"gnuplotbugs@...\" DHELPFILE=\"/usr/local/share/gnuplot/4.3/gnuplot.gih\" DGNUPLOT_X11=\"`echo gnuplot_x11  sed 's,x,x,'`\" I/usr/X11R6/include I/usr/local/include I/usr/local/include g O2 MT specfun.o MD MP MF ".deps/specfun.Tpo" c o specfun.o specfun.c; \ then mv f ".deps/specfun.Tpo" ".deps/specfun.Po"; else rm f ".deps/specfun.Tpo"; exit 1; fi specfun.c:1094: error: conflicting types for 'inverse_normal_func' specfun.c:996: error: previous implicit declaration of 'inverse_normal_func' was here 
From: <HBB<roeker@t...>  20070421 18:36:18

Nigel Nunn wrote: > Such scenarios are clean and simple when gnuplot is embedded as a > library of plotting routines in a simulation application. As discussed > in years past, the only constraint is (was?) that there remained a few > global variables, "A few" is actually rather far from the truth. Yes, the number of toplevel global variables has decreased (because most data is now kept in some struct or array), but there's still a good deal more than a few. 
From: Nigel Nunn <nN<unn@au...>  20070421 09:24:08

On 14 April 2007 Pawel Cesar Sanjuan Szklarz wrote: > Now I have the next problem: how to use external function to generate > the values of the vector field?? why I need this: on my functions I > solve a set equations to find the behavior of the robot. Thats why I > am thinking about the pipefeature. > > With the '+' filename it is possible in gnuplot to write the "x,y" > values to evaluate in some file?? > May be it is possible to write the "x,y" grid, then run some process > (in my case octave), and then use the results file to plot??? Later, Pawel Cesar Sanjuan Szklarz wrote: > Actually i need to send data from Gnuplot to Octave. Octave can send > data to gnuplot, but I would like to send back to octave the > information about the zoom and make a replot. > > I will check the path: > [ gnuplotPatches1027032 ] Connect gnuplot_x11 to exterior = application window > > maybe it is what i need. Such scenarios are clean and simple when gnuplot is embedded as a = library of plotting routines in a simulation application. As discussed = in years past, the only constraint is (was?) that there remained a few = global variables, thus multiple plotting panels were necessarily views = into the one set of gnuplot data. By wrapping these few variables into = a struct or C++ class, a simulation could have any number of inprocess = gnuplot sessions active, with all info about each plot's state and data = at hand. This was always how I used gnuplot, first embedded in an MFC GUI, then = later likewise in wxWindows. By the way, I remain confused by the way = the current wx terminal tries to drive a GUI, rather than having a = user's GUI drive (simultaneous) gnuplot (sessions). No doubt the = current setup is more appropriate in many common scenarios. Still, I = imagine gnuplot functionality embedded within a user's favorite GUI = would be nice. Nigel  =20 
From: Pawel Cesar Sanjuan Szklarz <paweld2@gm...>  20070417 16:14:58

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From: Ethan Merritt <merritt@u.washington.edu>  20070417 15:22:33

On Tuesday 17 April 2007 00:15, Pawel Cesar Sanjuan Szklarz wrote: > Hi. >=20 > Actually i need to send data from Gnuplot to Octave. Octave can send > data to gnuplot, but I would like to send back to octave the > information about the zoom and make a replot. You don't need any new features in gnuplot to do that. You can write the plot coordinates to an arbitrary file using old syntax: set term push set term table set output "coords.dat" plot ... set term pop New syntax (version 4.2): set table "coords.dat" plot ... unset table See for example the original vector field example .../demo/vector.dem You can even make this a pipe if you like, although I don't know if this would help with Octave. set table " my_program_expecting_an_input_stream" plot ... unset table More likely you would open a named pipe for read access in Octave, then trigger the gnuplot operation; gnuplot would in turn open the same named pipe for writing as above, as send the output back to Octave. You may find the examples on this page useful (the ones under "Programming interfaces =E2=80=93 bidirectional interaction= ") http://gnuplot.info/links.html >=20 > I will check the path: > [ gnuplotPatches1027032 ] Connect gnuplot_x11 to exterior application = window >=20 > maybe it is what i need. >=20 > Thank you. > Pawe=C5=82 Szklarz. >=20 > 2007/4/17, Daniel J Sebald <daniel.sebald@...>: > > Pawel Cesar Sanjuan Szklarz wrote: > > > > > Now I have the next ploblem: how to use external function to generate > > > the values of the vector field?? why I need this: on my functions I > > > solve a set equations to find the behavior of the robot. Thats why I > > > am thinking about the pipefeature. > > > > > > With the '+' filename it is possible in gnuplot to write the "x,y" > > > values to evaluate in some file?? > > > May be it is possible to write the "x,y" grid, then run some process ( > > > in my case octave), and then use the results file to plot??? > > > > The discussion of pipes and transfering data from Octave to gnuplot sho= uld go to > > the Octave list. Octave currently sends data to gnuplot though a pipe.= The > > Octave folks may be able to help you set something up in terms of trans= ferring > > data and the type of plot you'd like to generate. > > > > I've also update the patch > > > > [ gnuplotPatches1027032 ] Connect gnuplot_x11 to exterior application= window > > > > which uses a pipe created using TCL rather than C, but I see now that i= sn't > > anything you need. > > > > Dan > > >  > This SF.net email is sponsored by DB2 Express > Download DB2 Express C  the FREE version of DB2 express and take > control of your XML. No limits. Just data. Click to get it now. > http://sourceforge.net/powerbar/db2/ > _______________________________________________ > gnuplotbeta mailing list > gnuplotbeta@... > https://lists.sourceforge.net/lists/listinfo/gnuplotbeta >=20 =2D=20 Ethan A Merritt Courier Deliveries: 1959 NE Pacific Dept of Biochemistry Health Sciences Building University of Washington  Seattle WA 981957742 
From: Daniel J Sebald <daniel.sebald@ie...>  20070417 07:28:42

Pawel Cesar Sanjuan Szklarz wrote: > Hi. > > Actually i need to send data from Gnuplot to Octave. Octave can send > data to gnuplot, but I would like to send back to octave the > information about the zoom and make a replot. > > I will check the path: > [ gnuplotPatches1027032 ] Connect gnuplot_x11 to exterior application window > > maybe it is what i need. Probably not. Well, I think this too is better discussed on the Octave list. Your feature request (i.e., getting data regarding mouse, zoom, autorange from gnuplot as opposed to just sending data to gnuplot) is something Octave developers have talked about but haven't placed at high enough priority to motivate someone to make it happen. Dan 
From: Pawel Cesar Sanjuan Szklarz <paweld2@gm...>  20070417 07:15:35

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From: Daniel J Sebald <daniel.sebald@ie...>  20070417 03:01:19

Pawel Cesar Sanjuan Szklarz wrote: > Now I have the next ploblem: how to use external function to generate > the values of the vector field?? why I need this: on my functions I > solve a set equations to find the behavior of the robot. Thats why I > am thinking about the pipefeature. > > With the '+' filename it is possible in gnuplot to write the "x,y" > values to evaluate in some file?? > May be it is possible to write the "x,y" grid, then run some process ( > in my case octave), and then use the results file to plot??? The discussion of pipes and transfering data from Octave to gnuplot should go to the Octave list. Octave currently sends data to gnuplot though a pipe. The Octave folks may be able to help you set something up in terms of transferring data and the type of plot you'd like to generate. I've also update the patch [ gnuplotPatches1027032 ] Connect gnuplot_x11 to exterior application window which uses a pipe created using TCL rather than C, but I see now that isn't anything you need. Dan 
From: Pawel Cesar Sanjuan Szklarz <paweld2@gm...>  20070415 17:40:40

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From: Ethan A Merritt <merritt@u.washington.edu>  20070415 15:28:19

On Sunday 15 April 2007 00:44, Pawel Cesar Sanjuan Szklarz wrote: > Hi. > the plot > splot '+' 1:2:(sin($1)*$2*$2):(cos($2)*$1*$1) with vectors > is not working. I not found any splot with vectors example in the demo files: > bash: grep splot *  grep vectors I did not have the command quite right. I was forgetting that for splot you need to give a z coordinate for each endpoint, even if they are all the same. This works: set samples 10 set isosamples set xrange [0:1] set yrange [0:1] set view map splot '+' using 1:2:0:(sin($1)/20.):(cos($2)/20.):0 with vectors > But what I need is a 2d plot with vectors, the same as Yes, if you are reading the coordinates from a file then you can do this with "plot". But in order to autogenerate a 2D grid, you need to use "splot". The normal use for splot is to generate 3D plots, by associating a Z value with each [x,y] sample. However, my example above reuses the x and y coordinates to calculate each end of a vector in the plane Z=0. I have attached the output of my example as an *.eps file. As I said, this is a very new feature, and you may be able to suggest enhancements to make it better. Ethan > gnuplot>plot 'mydataField.dat' using 1:2:3:4 with vectors > > where in the file 'mydataField.dat' I have > x y sin(x)*y^2 cos(y)x^2 > calculated for all points. > > I would like to get the same using something like special functions: > gnuplot>plot '+' using 1:2:(sin($1)*$2*$2):(cos($2)*$1*$1) with vectors > > Pawel Szklarz. > > 2007/4/14, Ethan A Merritt <merritt@...>: > > On Saturday 14 April 2007 10:29, Pawel Cesar Sanjuan Szklarz wrote: > > > Hi > > > > > > I am interested in add a feature do gnuplot: 2d vector fields from > > > R^2>R^2 functions > > > > > > example: > > > gnuplot>plot (sin(x)*y^2,cos(y)x^2) with 2dVectorField > > > > Please have a look at the very recent feature added to the cvs version: > > > > gnuplot> help specialfilenames > > There are three filenames that have a special meaning: '', '', and '+'. > > The special filename '+' is a mechanism to allow the full range of > > `using` specifiers and plot styles with inline functions. Normally a > > function plot can only have a single y (or z) value associated with each > > sampled point. The pseudofile '+' treats the sampled points as columns > > 1 (plot) or 1 and 2 (splot), and allows additional column values to be > > specified via a `using` specification, just as for a true input file. > > Example: > > plot '+' using ($1):(sin($1)):(sin($1)**2) with filledcurves > > > > > > You may be able to use this new mechanism to do your plotting. > > Or maybe not. I'm not sure I understand what is the intended output > > from your example. Is it a set of vectors, with each vector connecting > > (x,y) to (sin(x)*y^2, cos(y)*x^2) ? That would be something like > > splot '+' 1:2:(sin($1)*$2*$2):(cos($2)*$1*$1) with vectors > > You may have to change "set isosamples" first. > > > > Of course Octave doesn't yet know about this option, but I'm sure > > that can be fixed. > > > > > > > > > > > > I know that it is possible to create a datafile with the information > > > about the vector field, but it can be nice to make zoom and don't > > > worry about the data density in the datafile. > > > > > > I would like to add another feature: I would like to use octave (for > > > example) to calculate the value of some function. > > > My proposition is not to run octave many times, but to create a > > > children process and send/recibe values by PIPES, example: > > > > > > gnuplot>open calculator 'myCulculatorProgram' > > > now gnuplot forks and create a children process > > > "system('myCulculatorProgram')" and is ready to use that program to > > > calculate something (open 2 pipes gnuplot<>Mycalculator) > > > gnuplot>plot calculator('myExternalFunctionName',x,y) > > > To calculate the value of > > > calculator('myExternalFunctionName',x,y) > > > gnuplot send data by the pipe to the children process and white for > > > the results in another pipe. > > > > > > This feature can by really great, octave is what I need, but with this > > > mechanism it is possible even to send SOAP request to some special > > > megacalculationserver or what ever. > > > > > > I have ready some code for this feature, but i would like to know: > > > can be this useful? > > >  it is possible to make something equivalent with gnuplot in some other way > > > And if this is a new feature, then: > > >  what format to use for this features (represent R2>R2 functions, > > > and the external calculator) > > >  how to submit code to CVS > > > > > > Thanks > > > > > >  > > > This SF.net email is sponsored by DB2 Express > > > Download DB2 Express C  the FREE version of DB2 express and take > > > control of your XML. No limits. Just data. Click to get it now. > > > http://sourceforge.net/powerbar/db2/ > > > _______________________________________________ > > > gnuplotbeta mailing list > > > gnuplotbeta@... > > > https://lists.sourceforge.net/lists/listinfo/gnuplotbeta > > > > > > >  > > Ethan A Merritt > > Biomolecular Structure Center > > University of Washington, Seattle 981957742 > > > >  > This SF.net email is sponsored by DB2 Express > Download DB2 Express C  the FREE version of DB2 express and take > control of your XML. No limits. Just data. Click to get it now. > http://sourceforge.net/powerbar/db2/ > _______________________________________________ > gnuplotbeta mailing list > gnuplotbeta@... > https://lists.sourceforge.net/lists/listinfo/gnuplotbeta >  Ethan A Merritt Biomolecular Structure Center University of Washington, Seattle 981957742 
From: Pawel Cesar Sanjuan Szklarz <paweld2@gm...>  20070415 07:52:08

Hi Dan. I don't only want to use octave from gnuplot. Of course to use the pipesfeature with octave, then i need to make some changes in octave, or create a wrapper that for any request runs octave. Maybe a wrapper is a good choice. Gnuplot can send a 1 big request to the children process for 1 plot and read only ones the plot data. Pawel Szklarz. 2007/4/14, Daniel J Sebald <daniel.sebald@...>: > Pawel Cesar Sanjuan Szklarz wrote: > > > I would like to add another feature: I would like to use octave (for > > example) to calculate the value of some function. > > My proposition is not to run octave many times, but to create a > > children process and send/recibe values by PIPES, example: > > This would be better discussed on the Octave list because that is where the work > for such a setup would have to be done. In fact, there was recently a user who > proposed something similar on that list. I will forward you that submission in > a separate email. > > Dan > 
From: Pawel Cesar Sanjuan Szklarz <paweld2@gm...>  20070415 07:44:25

Hi. the plot splot '+' 1:2:(sin($1)*$2*$2):(cos($2)*$1*$1) with vectors is not working. I not found any splot with vectors example in the demo files: bash: grep splot *  grep vectors But what I need is a 2d plot with vectors, the same as gnuplot>plot 'mydataField.dat' using 1:2:3:4 with vectors where in the file 'mydataField.dat' I have x y sin(x)*y^2 cos(y)x^2 calculated for all points. I would like to get the same using something like special functions: gnuplot>plot '+' using 1:2:(sin($1)*$2*$2):(cos($2)*$1*$1) with vectors Pawel Szklarz. 2007/4/14, Ethan A Merritt <merritt@...>: > On Saturday 14 April 2007 10:29, Pawel Cesar Sanjuan Szklarz wrote: > > Hi > > > > I am interested in add a feature do gnuplot: 2d vector fields from > > R^2>R^2 functions > > > > example: > > gnuplot>plot (sin(x)*y^2,cos(y)x^2) with 2dVectorField > > Please have a look at the very recent feature added to the cvs version: > > gnuplot> help specialfilenames > There are three filenames that have a special meaning: '', '', and '+'. > The special filename '+' is a mechanism to allow the full range of > `using` specifiers and plot styles with inline functions. Normally a > function plot can only have a single y (or z) value associated with each > sampled point. The pseudofile '+' treats the sampled points as columns > 1 (plot) or 1 and 2 (splot), and allows additional column values to be > specified via a `using` specification, just as for a true input file. > Example: > plot '+' using ($1):(sin($1)):(sin($1)**2) with filledcurves > > > You may be able to use this new mechanism to do your plotting. > Or maybe not. I'm not sure I understand what is the intended output > from your example. Is it a set of vectors, with each vector connecting > (x,y) to (sin(x)*y^2, cos(y)*x^2) ? That would be something like > splot '+' 1:2:(sin($1)*$2*$2):(cos($2)*$1*$1) with vectors > You may have to change "set isosamples" first. > > Of course Octave doesn't yet know about this option, but I'm sure > that can be fixed. > > > > > > > I know that it is possible to create a datafile with the information > > about the vector field, but it can be nice to make zoom and don't > > worry about the data density in the datafile. > > > > I would like to add another feature: I would like to use octave (for > > example) to calculate the value of some function. > > My proposition is not to run octave many times, but to create a > > children process and send/recibe values by PIPES, example: > > > > gnuplot>open calculator 'myCulculatorProgram' > > now gnuplot forks and create a children process > > "system('myCulculatorProgram')" and is ready to use that program to > > calculate something (open 2 pipes gnuplot<>Mycalculator) > > gnuplot>plot calculator('myExternalFunctionName',x,y) > > To calculate the value of > > calculator('myExternalFunctionName',x,y) > > gnuplot send data by the pipe to the children process and white for > > the results in another pipe. > > > > This feature can by really great, octave is what I need, but with this > > mechanism it is possible even to send SOAP request to some special > > megacalculationserver or what ever. > > > > I have ready some code for this feature, but i would like to know: > > can be this useful? > >  it is possible to make something equivalent with gnuplot in some other way > > And if this is a new feature, then: > >  what format to use for this features (represent R2>R2 functions, > > and the external calculator) > >  how to submit code to CVS > > > > Thanks > > > >  > > This SF.net email is sponsored by DB2 Express > > Download DB2 Express C  the FREE version of DB2 express and take > > control of your XML. No limits. Just data. Click to get it now. > > http://sourceforge.net/powerbar/db2/ > > _______________________________________________ > > gnuplotbeta mailing list > > gnuplotbeta@... > > https://lists.sourceforge.net/lists/listinfo/gnuplotbeta > > > >  > Ethan A Merritt > Biomolecular Structure Center > University of Washington, Seattle 981957742 > 
From: Ethan A Merritt <merritt@u.washington.edu>  20070415 00:44:12

On Friday 13 April 2007 08:16, Bastian M=C3=A4rkisch wrote: > > > I couldn't resist. Here is a working version that correctly starts > > > at 99 and counts down to "No bottles of beer". >=20 > Challenged by Ethans script I tried to come up with a graphics > version: a parametrized beerbottlefunction :) To get an > onscreen display try: > mode =3D "i"; load "99bottles_gfx.gp" > or, for an animated GIF, try > mode =3D "a"; load "99bottles_gfx.gp" >=20 > Hope you have some fun with it, too! I have put both versions under "Useful Scripts" on the web site: http://gnuplot.sourceforge.net/scripts/index.html =2D=20 Ethan A Merritt Biomolecular Structure Center University of Washington, Seattle 981957742 
From: Daniel J Sebald <daniel.sebald@ie...>  20070414 19:02:39

Pawel Cesar Sanjuan Szklarz wrote: > I would like to add another feature: I would like to use octave (for > example) to calculate the value of some function. > My proposition is not to run octave many times, but to create a > children process and send/recibe values by PIPES, example: This would be better discussed on the Octave list because that is where the work for such a setup would have to be done. In fact, there was recently a user who proposed something similar on that list. I will forward you that submission in a separate email. Dan 
From: Ethan A Merritt <merritt@u.washington.edu>  20070414 17:42:30

On Saturday 14 April 2007 10:29, Pawel Cesar Sanjuan Szklarz wrote: > Hi > > I am interested in add a feature do gnuplot: 2d vector fields from > R^2>R^2 functions > > example: > gnuplot>plot (sin(x)*y^2,cos(y)x^2) with 2dVectorField Please have a look at the very recent feature added to the cvs version: gnuplot> help specialfilenames There are three filenames that have a special meaning: '', '', and '+'. The special filename '+' is a mechanism to allow the full range of `using` specifiers and plot styles with inline functions. Normally a function plot can only have a single y (or z) value associated with each sampled point. The pseudofile '+' treats the sampled points as columns 1 (plot) or 1 and 2 (splot), and allows additional column values to be specified via a `using` specification, just as for a true input file. Example: plot '+' using ($1):(sin($1)):(sin($1)**2) with filledcurves You may be able to use this new mechanism to do your plotting. Or maybe not. I'm not sure I understand what is the intended output from your example. Is it a set of vectors, with each vector connecting (x,y) to (sin(x)*y^2, cos(y)*x^2) ? That would be something like splot '+' 1:2:(sin($1)*$2*$2):(cos($2)*$1*$1) with vectors You may have to change "set isosamples" first. Of course Octave doesn't yet know about this option, but I'm sure that can be fixed. > > I know that it is possible to create a datafile with the information > about the vector field, but it can be nice to make zoom and don't > worry about the data density in the datafile. > > I would like to add another feature: I would like to use octave (for > example) to calculate the value of some function. > My proposition is not to run octave many times, but to create a > children process and send/recibe values by PIPES, example: > > gnuplot>open calculator 'myCulculatorProgram' > now gnuplot forks and create a children process > "system('myCulculatorProgram')" and is ready to use that program to > calculate something (open 2 pipes gnuplot<>Mycalculator) > gnuplot>plot calculator('myExternalFunctionName',x,y) > To calculate the value of > calculator('myExternalFunctionName',x,y) > gnuplot send data by the pipe to the children process and white for > the results in another pipe. > > This feature can by really great, octave is what I need, but with this > mechanism it is possible even to send SOAP request to some special > megacalculationserver or what ever. > > I have ready some code for this feature, but i would like to know: > can be this useful? >  it is possible to make something equivalent with gnuplot in some other way > And if this is a new feature, then: >  what format to use for this features (represent R2>R2 functions, > and the external calculator) >  how to submit code to CVS > > Thanks > >  > This SF.net email is sponsored by DB2 Express > Download DB2 Express C  the FREE version of DB2 express and take > control of your XML. No limits. Just data. Click to get it now. > http://sourceforge.net/powerbar/db2/ > _______________________________________________ > gnuplotbeta mailing list > gnuplotbeta@... > https://lists.sourceforge.net/lists/listinfo/gnuplotbeta >  Ethan A Merritt Biomolecular Structure Center University of Washington, Seattle 981957742 
From: Pawel Cesar Sanjuan Szklarz <paweld2@gm...>  20070414 17:29:13

Hi I am interested in add a feature do gnuplot: 2d vector fields from R^2>R^2 functions example: gnuplot>plot (sin(x)*y^2,cos(y)x^2) with 2dVectorField I know that it is possible to create a datafile with the information about the vector field, but it can be nice to make zoom and don't worry about the data density in the datafile. I would like to add another feature: I would like to use octave (for example) to calculate the value of some function. My proposition is not to run octave many times, but to create a children process and send/recibe values by PIPES, example: gnuplot>open calculator 'myCulculatorProgram' now gnuplot forks and create a children process "system('myCulculatorProgram')" and is ready to use that program to calculate something (open 2 pipes gnuplot<>Mycalculator) gnuplot>plot calculator('myExternalFunctionName',x,y) To calculate the value of calculator('myExternalFunctionName',x,y) gnuplot send data by the pipe to the children process and white for the results in another pipe. This feature can by really great, octave is what I need, but with this mechanism it is possible even to send SOAP request to some special megacalculationserver or what ever. I have ready some code for this feature, but i would like to know: can be this useful?  it is possible to make something equivalent with gnuplot in some other way And if this is a new feature, then:  what format to use for this features (represent R2>R2 functions, and the external calculator)  how to submit code to CVS Thanks 
From: <bmaerkisch@we...>  20070413 15:17:02

From: Petr Mikulik <mikulik@ph...>  20070412 20:59:54

> > Octave is getting M* compatibility, where the "set"like commands are > > written after(!) the plot command, and thus it usually needs several (fast) > > redraws with the original data. > > I don't think that conclusion is strictly true. The octave side of things > could observe the command stream and hold back on the 'plot' command until > after the stream of 'set' commands is at its end. It does not work as you think. Plot appears after each plot command, and is redrawn after each "set" command which changes properties of that plot. See help automatic_replot for more details. (It should be set to 1 for M* compatibility.)  PM 
From: <HBB<roeker@t...>  20070412 19:41:53

Petr Mikulik wrote: > Octave is getting M* compatibility, where the "set"like commands are > written after(!) the plot command, and thus it usually needs several (fast) > redraws with the original data. I don't think that conclusion is strictly true. The octave side of things could observe the command stream and hold back on the 'plot' command until after the stream of 'set' commands is at its end. 
From: Petr Mikulik <mikulik@ph...>  20070411 22:27:36

I'm fine with the new command "redraw". > It's not clear to me that we need to make this new functionality > visible from the command line at all. The mouse zooming can call > a new internal routine with no corresponding user command. > Let's get it working first, and only then worry about whether > it is worth adding a new user command. Yes, it is important to have it exposed to the user interface. Octave is getting M* compatibility, where the "set"like commands are written after(!) the plot command, and thus it usually needs several (fast) redraws with the original data. It would be great if gnuplot can provide this.  PM 
From: Dmitri A. Sergatskov <dasergatskov@gm...>  20070411 05:09:12

On 4/10/07, Ethan A Merritt <merritt@...> wrote: > On Tuesday 10 April 2007 21:49, Dmitri A. Sergatskov wrote: > > Setting isosamples to some high numbers messes up pm3d colormap. > > > > Terminal type set to 'wxt' > > gnuplot> set pm3d > > > > gnuplot> set isosamples 100 > > gnuplot> splot x+y > > > > (the plane all painted red) > > It is an artifact of finite line width. > Each rectangle has a red line around it, and when the boxes become > very small then all you can see is the bounding line. > > Try : > set pm3d > splot x+y linewidth 0.0001 > Thanks. I just figured out that "unset surf" helps, but did not come to the final solution :). > >  > Ethan A Merritt > Biomolecular Structure Center > University of Washington, Seattle 981957742 > Regards, Dmitri. 
From: Ethan A Merritt <merritt@u.washington.edu>  20070411 04:58:47

On Tuesday 10 April 2007 21:49, Dmitri A. Sergatskov wrote: > Setting isosamples to some high numbers messes up pm3d colormap. > > Terminal type set to 'wxt' > gnuplot> set pm3d > > gnuplot> set isosamples 100 > gnuplot> splot x+y > > (the plane all painted red) It is an artifact of finite line width. Each rectangle has a red line around it, and when the boxes become very small then all you can see is the bounding line. Try : set pm3d splot x+y linewidth 0.0001  Ethan A Merritt Biomolecular Structure Center University of Washington, Seattle 981957742 