plplot-general — PLplot user discussion group

[Plplot-general] contour plot

[<WH...@bf...>]

hi list,
here is the not-working (but compiling) testprogramm of mine. the data are:
input:  x,y position and z=value here 0 or 1
i do plpoin() to demonstrate the data are there.
then i copy from struct in the feld X,Y,Z just to have
access, not clever but i works.
the target data dX,dY are filed with 0..count

after tranlating my data in to gridded data
i try to display the stuff.

were did i get the concept wrong ?

walter


#include <stdio.h>
#include <stdlib.h>


#include <math.h>
#include <string.h>
#include <ctype.h>


#include "plplot/plConfig.h"
#include "plplot/plplot.h"

struct station {
  PLFLT x;
  PLFLT y;
  PLFLT z;
      };


int count=20;
int main(int argc, char *argv[])
{
  /* original data set */

  struct station pnt[count]; 

  PLFLT X[count];
  PLFLT Y[count];
  PLFLT Z[count];

  /* display data set */
  PLFLT dX[count];
  PLFLT dY[count];
  PLFLT **dZ;

  int i,alg,xborder,yborder;;
  (void) plParseOpts(&argc, argv, PL_PARSE_FULL);
  

  for(i=0;i<count;i++) {
    pnt[i].x= (PLFLT) (rand()%100); /* 0...99 */
    pnt[i].y= (PLFLT) (rand()%100); /* 0...99 */
    pnt[i].z= (PLFLT) (rand()& 1);        /* 0,1    */
  }


  /* Initialize plplot */
    plsdev ("xwin");    /* we use only X11 */
    plinit();  

  for(i=0;i<count;i++) {
    X[i]=pnt[i].x;
    Y[i]=pnt[i].y;
    Z[i]=pnt[i].z;
    dX[i]=i;
    dY[i]=i;

  } 
  plAlloc2dGrid(&dZ, count, count); /* the output grided data */

  alg=1;

  xborder=10;
  yborder=10;  
  pladv(0);
  plvpor(0.1,0.9,0.1,0.9);
  plwind(0-xborder, 100+xborder ,0-yborder, 100+yborder );
  plpoin(count, X, Y, 5);
  pladv(0);
  pllab("", "", "titletest");
  plgriddata(X,Y,Z,count,dX,count,dY,count,dZ,alg,GRID_CSA);
  plot3d(dX,dY,dZ,count,count,DRAW_LINEXY,0);
  pladv(0);
  plend();
  return 0;
}

Re: [Plplot-general] contour plot question

[Arjen M. <arj...@wl...>]

" (Walter Harms)" wrote:
> 
> Hi arjen,
> thx for reply. plpoin3() displays a 3D cloud. so far i
> understand i need a function function that takes:
> unordered ( pos (x,y)+ value)  -> value=z[x'][y'] (ordered)
> I had the implession that  plgriddata() will do exacty that.
> 
> i have a simple example programm of the problem (not working)
> can i post this to the ml as explanation what i am looking for ?
> 
> regards,
> walter
> 

Sure, if it is not too long, i.e. below say 100 lines, 
it should be no problem. I did not have a detailed
look yet at your other posting ...

Regards,

Arjen

Re: Re: [Plplot-general] contour plot question

[<WH...@bf...>]

Hi arjen,
thx for reply. plpoin3() displays a 3D cloud. so far i 
understand i need a function function that takes:
unordered ( pos (x,y)+ value)  -> value=z[x'][y'] (ordered)
I had the implession that  plgriddata() will do exacty that.

i have a simple example programm of the problem (not working)
can i post this to the ml as explanation what i am looking for ?

regards,
walter



- - - - - - - - - - - - - - Original Message - - - - - - - - - - - - - -
From: Arjen Markus <arj...@wl...>
Subject: Re: [Plplot-general] contour plot question
Date: 08/10/04 10:02

" (Walter Harms)" wrote:
> 
> hi list,
> i am looking for a way to plot isolines. so far i understand
> is the way plpoin3(). therefor you need z[x][y]. the problem
> is i have data for x=0...6000,y=0...9000. a simple field would
> become very expensive exspecialy if i have only 2500 point in total (uneven distributed).
> 
> Is there a way to plot a "3D field" like plploin(N,x,y,z) ?
> 
> regards,
> walter
> 
> 
In addition to Alan's reply, the need for array elements z[x][y] does
not
necessarily mean that you need data for every integral value of x and y,
as you
seem to imply.

plpoin3() expects individual points (x[i],y[i],z[i]) (i=0,...,N).

You may want to look at plcont() for filled contours for instance, which
takes
a matrix z[nx][ny].

Regards,

Arjen

Re: [Plplot-general] contour plot question

[Arjen M. <arj...@wl...>]

" (Walter Harms)" wrote:
> 
> hi list,
> i am looking for a way to plot isolines. so far i understand
> is the way plpoin3(). therefor you need z[x][y]. the problem
> is i have data for x=0...6000,y=0...9000. a simple field would
> become very expensive exspecialy if i have only 2500 point in total (uneven distributed).
> 
> Is there a way to plot a "3D field" like plploin(N,x,y,z) ?
> 
> regards,
> walter
> 
> 
In addition to Alan's reply, the need for array elements z[x][y] does
not
necessarily mean that you need data for every integral value of x and y,
as you
seem to imply.

plpoin3() expects individual points (x[i],y[i],z[i]) (i=0,...,N).

You may want to look at plcont() for filled contours for instance, which
takes
a matrix z[nx][ny].

Regards,

Arjen

[Plplot-general] PLplot packages for Debian woody

[Rafael L. <rla...@us...>]

The Debian packages for PLplot 5.3.1 have been backported for Debian stable
(a.k.a "woody").  Instructions for accessing them through apt are available
at: 

    http://plplot.sourceforge.net/resources/

CAVEAT: the packages have not been extensively tested.  At least the C
examples work fine.

-- 
Rafael

[Plplot-general] still problems with plgriddata() :(

[<WH...@bf...>]

hi,
i have still problems with these grid data stuff. perhaps i am on
the wrong way ?

here  is a shortcut of my problem:
/* count 2D-points with value Z */ 

count=20;
 for(i=0;i<count;i++) {
    pnt[i].x= (PLFLT) (rand()%100); /* 0...99 */
    pnt[i].y= (PLFLT) (rand()%100); /* 0...99 */
    pnt[i].z= (PLFLT) (rand()& 1);        /* 0,1    */
  }



my impression was that plgriddata() das the magic to move [x,y,z] -> z[a][b]
/* 
org line from my trial X,Y,Z is the array with the original data
dY,dX,dZ is the (display)data
*/
plgriddata(X,Y,Z,count,dX,count,dY,count,dZ,alg,GRID_CSA);

I exspected now a mesh (or something like that) with:
plot3d(dX,dY,dZ,count,count,DRAW_LINEXY,0);

I did saome other experiments but obviously i got something seriously wrong :(

regards,
walter

Re: [Plplot-general] plgriddata() error from x21c

[Rafael L. <rla...@us...>]

* Walter Harms <WH...@bf...> [2004-08-05 10:12]:

> the example 21 seems to work ok. i get the 3 pictures i see
> with http://plplot.sourceforge.net/examples/demo21.php
> but with delauny and natural neighboirs missing.
> something to worry about ?
> 
> *** PLPLOT ERROR ***
> plgriddata(): you must have Qhull to use GRID_DTLI., aborting operation

The error message above means exactly what it says: "you must have Qhull to
use GRID_DTLI".  In other words, you must install the Qhull library in your
system (see http://www.qhull.org).  PLplot's configure will automatically
detect its presence.

-- 
Rafael

[Plplot-general] plgriddata() error from x21c

[<WH...@bf...>]

hi list,
the example 21 seems to work ok. i get the 3 pictures i see
with http://plplot.sourceforge.net/examples/demo21.php
but with delauny and natural neighboirs missing.
something to worry about ?

*** PLPLOT ERROR ***
plgriddata(): you must have Qhull to use GRID_DTLI., aborting operation

Re: Re: [Plplot-general] contour plot question

[<WH...@bf...>]

hi alan,
looks interessting. i will try it.

The problem i have is a more geographic one. Asume you have samples
from all over alaska. now you want to plot the distribution.
Clearly you have vast streches with no data (sea, canada), then "clusters" from
easy accessable sites that define a minimum resolution and "normal"
data. (not exacly my problem but you will get the picture, i hope)

regards,
walter




- - - - - - - - - - - - - - Original Message - - - - - - - - - - - - - -
From: Alan W. Irwin <ir...@be...>
Subject: Re: [Plplot-general] contour plot question
Date: 08/04/04 18:38

On 2004-08-04 17:57+0200 WH...@bf... wrote:

> hi list,
> i am looking for a way to plot isolines. so far i understand
> is the way plpoin3(). therefor you need z[x][y]. the problem
> is i have data for x=0...6000,y=0...9000. a simple field would
> become very expensive exspecialy if i have only 2500 point in total (uneven distributed).
>
> Is there a way to plot a "3D field" like plploin(N,x,y,z) ?
>

I may not properly understand your question, but I will try to answer
anyway.

To transform irregularly spaced data to a uniform grid take a look at
http://plplot.sourceforge.net/docbook-manual/plplot-html-5.3.1/plgriddata.html
for documentation and http://plplot.sourceforge.net/examples/demo21.php for
an example using this function.

After you have transformed your data to a uniform grid, then try
http://plplot.sourceforge.net/docbook-manual/plplot-html-5.3.1/plcont.html
to plot contours. http://plplot.sourceforge.net/examples/demo09.php shows
contour examples.

If, instead, you simply want to plot a 3D line in 3D perspective, have a
look at
http://plplot.sourceforge.net/docbook-manual/plplot-html-5.3.1/plline3.html
and http://plplot.sourceforge.net/examples/demo18.php.

Alan
__________________________
Alan W. Irwin
email: ir...@be...
phone: 250-727-2902

Astronomical research affiliation with Department of Physics and Astronomy,
University of Victoria (astrowww.phys.uvic.ca).

Programming affiliations with the PLplot scientific plotting software
package (plplot.org), the Yorick front-end to PLplot (yplot.sf.net), the
Loads of Linux Links project (loll.sf.net), and the Linux Brochure Project
(lbproject.sf.net).
__________________________

Linux-powered Science
__________________________


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Re: [Plplot-general] contour plot question

[Alan W. I. <ir...@be...>]

On 2004-08-04 17:57+0200 WH...@bf... wrote:

> hi list,
> i am looking for a way to plot isolines. so far i understand
> is the way plpoin3(). therefor you need z[x][y]. the problem
> is i have data for x=0...6000,y=0...9000. a simple field would
> become very expensive exspecialy if i have only 2500 point in total (uneven distributed).
>
> Is there a way to plot a "3D field" like plploin(N,x,y,z) ?
>

I may not properly understand your question, but I will try to answer
anyway.

To transform irregularly spaced data to a uniform grid take a look at
http://plplot.sourceforge.net/docbook-manual/plplot-html-5.3.1/plgriddata.html
for documentation and http://plplot.sourceforge.net/examples/demo21.php for
an example using this function.

After you have transformed your data to a uniform grid, then try
http://plplot.sourceforge.net/docbook-manual/plplot-html-5.3.1/plcont.html
to plot contours. http://plplot.sourceforge.net/examples/demo09.php shows
contour examples.

If, instead, you simply want to plot a 3D line in 3D perspective, have a
look at
http://plplot.sourceforge.net/docbook-manual/plplot-html-5.3.1/plline3.html
and http://plplot.sourceforge.net/examples/demo18.php.

Alan
__________________________
Alan W. Irwin
email: ir...@be...
phone: 250-727-2902

Astronomical research affiliation with Department of Physics and Astronomy,
University of Victoria (astrowww.phys.uvic.ca).

Programming affiliations with the PLplot scientific plotting software
package (plplot.org), the Yorick front-end to PLplot (yplot.sf.net), the
Loads of Linux Links project (loll.sf.net), and the Linux Brochure Project
(lbproject.sf.net).
__________________________

Linux-powered Science
__________________________

[Plplot-general] contour plot question

[<WH...@bf...>]

hi list,
i am looking for a way to plot isolines. so far i understand
is the way plpoin3(). therefor you need z[x][y]. the problem
is i have data for x=0...6000,y=0...9000. a simple field would
become very expensive exspecialy if i have only 2500 point in total (uneven distributed).

Is there a way to plot a "3D field" like plploin(N,x,y,z) ?

regards,
walter
 

Re: [Plplot-general] overlapping axis labels

[Andrew R. <and...@us...>]

On Fri, Jul 30, 2004 at 04:13:23AM -0700, Harry Kao wrote:
> I'm having some problems with numeric axis labels that overlap.  In my
> mind, the default output should always be non-overlapping.  Is this a
> known issue?  Or is there a way to fix this?  (Or am I doing something
> wrong?)  I've inlined some sample code below that shows overlapping
> text on the y-axis.  I'm using version 5.3.0 on Debian.
> 

It definitely looks to me like this is a bug. I guess the 3-d code has
probably been less well tested. Several of the developers are currently
tied up with work / holidays, however I'll add it to my list of things
to investigate futher. 

In the meantime you can always work around this by setting the axis
spacing manually. Changing the viewing angle might also help. For
certain angles it is hard to avoid the labels overlapping.

Thanks for pointing this out.

Andrew

[Plplot-general] overlapping axis labels

[Harry K. <hk...@ug...>]

I'm having some problems with numeric axis labels that overlap.  In my
mind, the default output should always be non-overlapping.  Is this a
known issue?  Or is there a way to fix this?  (Or am I doing something
wrong?)  I've inlined some sample code below that shows overlapping
text on the y-axis.  I'm using version 5.3.0 on Debian.

Harry


#include <plplot.h>
 
int main()
{
  plinit();
  pladv(0);
 
  plvpor(0.0, 1.0, 0.0, 0.9);
  plwind(-1.0, 1.0, -1.0, 1.5);
  plw3d(1.0, 1.0, 1.2, 0, 66, 450, 1650, -21.15, 149.27, 22.5, 30);
  plbox3("bnstu", "x", 0.0, 0,
     "bnstu", "y", 0.0, 0,
     "bcdmnstuv", "z", 0.0, 4);
 
  plend();
  return 0;
}

Re: [Plplot-general] RE: subpages in pages.

[Rafael L. <rla...@us...>]

* ger...@si... <ger...@si...> [2004-07-15 13:28]:

> Couldn't figure out how to reply to my own posting!          
> So, I am sending another one.

> I do have my e-mail address and a password that I chose
> when I subscribed to the mailing list but they don't 
> seem to work when trying to login via ssl...do I need yet
> another account for that?, what's the deal?.  Sorry about 
> my ignorance, it's just that I don't have much experience
> when it comes to chat rooms, mailings list and that kind
> of on-line stuff.

What do you mean by "login via ssl"?  Why do you need to "login via ssl"
(whatever you mean by that) in order to be able to reply to your own post?
Sorry, I am confused...

Cheers,

-- 
Rafael

[Plplot-general] RE: subpages in pages.

[<ger...@si...>]

Couldn't figure out how to reply to my own posting!
So, I am sending another one.

I do have my e-mail address and a password that I chose
when I subscribed to the mailing list but they don't=20
seem to work when trying to login via ssl...do I need yet
another account for that?, what's the deal?.  Sorry about=20
my ignorance, it's just that I don't have much experience
when it comes to chat rooms, mailings list and that kind
of on-line stuff.

Anyway, getting back to the subpage matter, I thought plssub()
could only be called before plinit() as suggested by the second
paragraph of the Programmer's Reference Manual Chapter 2's section
Initializing PLplot.  But that was not quite the case.

In any case, generating a 2-page document where the first page
has 4 subpages, and the second page only 2 subpages turned out=20
to be rather simple:

	plssub(2,2)
	plinit()
	.
	.
	.
	pleop()
	plsub(2,1)
	plbop()
	.
	.
	.
	plend

Germ=E1n

Re: [Plplot-general] subpages in pages

[Alan W. I. <ir...@be...>]

On 2004-07-14 11:59-0400 ger...@si... wrote:

> Is it possible to have a multi-page postscript file with varying
> number of subpages? For instance, is it possible to generate a
> 2-page postscript file where the first page has 4 subpages and
> the second page has 2 subpages?

From the plssub code, it looks like this is entirely possible.  But I haven't
tried that myself.  Let us know how it goes.

Alan
__________________________
Alan W. Irwin
email: ir...@be...
phone: 250-727-2902

Astronomical research affiliation with Department of Physics and Astronomy,
University of Victoria (astrowww.phys.uvic.ca).

Programming affiliations with the PLplot scientific plotting software
package (plplot.org), the Yorick front-end to PLplot (yplot.sf.net), the
Loads of Linux Links project (loll.sf.net), and the Linux Brochure Project
(lbproject.sf.net).
__________________________

Linux-powered Science
__________________________

[Plplot-general] subpages in pages

[<ger...@si...>]

O.k., then, thank you very much for the answers to my previous posting,
they where both correct and got me going.

I have another question, now.

Is it possible to have a multi-page postscript file with varying=20
number of subpages? For instance, is it possible to generate a
2-page postscript file where the first page has 4 subpages and=20
the second page has 2 subpages?

Looking forward to your replies.

Germ=E1n

Re: [Plplot-general] My very first PLplot question: How do you actually compile a FORT RAN program?

[ooOoo <jg3...@ya...>]

Here's a very simple example that *might* get you
started:

f77 -o x01f -L /usr/local/lib -l plplotf77 x01f.f

(This worked for me with 5.3.0 under linux)

Substitute -L /usr/local/lib to whatever directory
contains the libplplotf77.* files for your
installation.

Also note that my LD_LIBRARY_PATH includes this same
directory (/usr/local/lib in my case):

    export LD_LIBRARY_PATH=/usr/local/lib
    (sample bash command to set this environment 
    variable)



--- ger...@si... wrote:
> 
> Hi, everybody:
> 
> I have downloaded PLplot and succesfully installed
> it (sun4u sparc SunOS
> 5.8) .  I have run the fortran examples and they all
> work. I have read the
> manual and familiarized my self with most commands.
> 
> Now, how in the world do I actually compile my own
> fortran program that uses
> plplot commands?  Nowhere in the user's manual is
> there a compilation
> example and the make files that compile the examples
> is HUGE and has a lot
> of stuff that I don't understand.
> 
> Does anyone have step-by-step instructions or a
> short, specific make file
> for a single program?
> 
> The directory where I installed PLplot from is :
> /usw/ude/plplot-5.3.1
> 
> The directory where I installed PLplot into is :
> /usw/ude/plplot
> 
> Thanks in advance for any assistance anybody my
> provide.
> 
> 	Germán
> 
> 
> 
> 
> 
>
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Re: [Plplot-general] My very first PLplot question: How do you actually compile a FORT RAN program?

[Alan W. I. <ir...@be...>]

On 2004-07-08 13:22-0400 ger...@si... wrote:

>
> Hi, everybody:
>
> I have downloaded PLplot and succesfully installed it (sun4u sparc SunOS
> 5.8) .  I have run the fortran examples and they all work. I have read the
> manual and familiarized my self with most commands.
>
> Now, how in the world do I actually compile my own fortran program that uses
> plplot commands?  Nowhere in the user's manual is there a compilation
> example and the make files that compile the examples is HUGE and has a lot
> of stuff that I don't understand.
>
> Does anyone have step-by-step instructions or a short, specific make file
> for a single program?
>
> The directory where I installed PLplot from is : /usw/ude/plplot-5.3.1
>
> The directory where I installed PLplot into is : /usw/ude/plplot

First, put your installed tree bin first on your path, copy the installed
examples to /tmp, build the executables, then run them.  That is do the
following:

export PATH='/usw/ude/plplot/bin:'$PATH
cd /tmp
cp -a /usw/ude/plplot/share/plplot5.3.1/examples /tmp
cd /tmp/examples
make
./plplot-test.sh

That last command should generate postscript results for a large number of
examples if everything is working well on your system.

Second, you will see in the results of the above make command (which is
special to the install tree examples), the exact command required
to build the installed fortran examples.  It should be straightforward to
generalize from that to your own fortran applications.

HTH.

Alan

__________________________
Alan W. Irwin
email: ir...@be...
phone: 250-727-2902

Astronomical research affiliation with Department of Physics and Astronomy,
University of Victoria (astrowww.phys.uvic.ca).

Programming affiliations with the PLplot scientific plotting software
package (plplot.org), the Yorick front-end to PLplot (yplot.sf.net), the
Loads of Linux Links project (loll.sf.net), and the Linux Brochure Project
(lbproject.sf.net).
__________________________

Linux-powered Science
__________________________

[Plplot-general] My very first PLplot question: How do you actually compile a FORT RAN program?

[<ger...@si...>]

Hi, everybody:

I have downloaded PLplot and succesfully installed it (sun4u sparc =
SunOS
5.8) .  I have run the fortran examples and they all work. I have read =
the
manual and familiarized my self with most commands.

Now, how in the world do I actually compile my own fortran program that =
uses
plplot commands?  Nowhere in the user's manual is there a compilation
example and the make files that compile the examples is HUGE and has a =
lot
of stuff that I don't understand.

Does anyone have step-by-step instructions or a short, specific make =
file
for a single program?

The directory where I installed PLplot from is : /usw/ude/plplot-5.3.1

The directory where I installed PLplot into is : /usw/ude/plplot

Thanks in advance for any assistance anybody my provide.

	Germ=E1n

[Plplot-general] Re: [Plplot-devel] PlPlot Undefined Reference

[Alan W. I. <ir...@be...>]

On 2004-07-02 01:40-0700 asdf asdf wrote:

> -
>>> Hi,
>>>
>>> I need to get PlPlot 5.3.1 working. I have
>> followed
>>> the  installation instructions, running
>> ./configure,
>>> make, and make install. When I try to run the
>> example
>>> programs, I keep getting undefined references to
>> all
>>> the functions used in the code. I have installed
>> this
>>> under Red-hat 7.1.
>>> Please give me some tips this is getting
>>> frustrating@@@@
>>
>> We need more details, please.  Was this for the
>> installed examples or in the
>> build tree?  If installed (which is our least
>> complicated and therefore most
>> reliable method of testing the examples), what
>> command did you use to build
>> the examples?
>>
>> Alan
>> ___
>
> Hi again,
>
> Thanks for replying.
> I'm not sure about what you are talking about when you
> say the build tree. Anyway, I went into the
> /home/me/plplot-5.3.1/examples/c directory and used
> the command gcc -o ex1 x01c.c. First I get the message
> that the header files cannot be found i.e. plplot.h
> etc. So to quickly get past this I hard coded them in
> the example file ie #include "/directory/plplot.h".
> That solved that problem. I then had the problem of
> undefined references. I installed redhat 7.2 and now
> am getting many more errors.
>
> I will post these errors soon, but in the mean time I
> am looking for a good way to install plplot and
> compile and run an example file.
>
> This is what I did after I downloaded the file:
>
> gunzip plplot-5.3.1.tar.gz...OK
>
> tar -xvf plplot-5.3.1.tar...OK
>
> cd plplot-5.3.1...OK

BTW, you are now in the build tree, i.e., the place where you run ./configure
>
> ./configure...No obvoius errors

What was the --prefix option for ./configure or did you just use the default
(/usr/local)?
>
> make...seems OK
>
> make install...seems OK

Let's assume the above install --prefix was /usr/local/plplot.  Then try the
following:

Put /usr/local/plplot/bin first on your path.  This is an important step.

PATH="/usr/local/plplot/bin:"$PATH

cd /tmp
# make copy of installed examples tree
cp -a /usr/local/plplot/share/plplot5.3.1/examples .
cd /tmp/examples
# Build all examples for copy of installed examples tree.
make
# Generate lots of example postscript results 
./plplot-test.sh

(Note, plplot-test.sh has lots of other possibilities for output.  Try
./plplot-test.sh --help to see those additional possibilities.)


>
> cd examples...OK

This is not correct.  You are trying to build examples in the build tree
referring to build tree headers and libraries, and that takes a special
command (make check), but let's not go there and stick to the installed
examples for now for the reasons I mentioned before, and also because the
installed version of PLplot is what your programmes will be interacting with
in future.

>
> make...OK
>
> cd c
>
> make...nothing to build...no executables
>
> gcc -o ex1 x01c.c...errors

Even if you were in the installed examples tree (which you are not) this is
not quite correct.  You need a number of specific options for that build and
link command.  Those are all supplied properly by the make command in the
copied installed examples tree above.  If you look more carefully at the
Makefile in the installed examples tree you will see references to the
command

plplot-config --cflags --libs

(there are other options as well if you have C++ source or fortran source
or if you are compiling some command to be used in a Tcl/Tk environment)

The results of that command on my system are as follows:

-I/usr/local/plplot/include/plplot -L/usr/local/plplot/lib
/usr/local/plplot/lib/libplplotd.so -Wl,--rpath -Wl,/usr/local/plplot/lib
-Wl,--rpath -Wl,/usr/local/plplot/lib

I encourage you to use this command to find out necessary options to build
the examples rather than cutting and pasting from this e-mail because the
specifics will be different on your system depending on your particular
configuration options.  Also, note you can build examples anywhere with the
options generated by plplot-config, but these options are specific to the
installed version of the PLplot headers and libraries and are not suitable
if you want to use the header files and libraries in the build tree.

Good luck!

Alan
__________________________
Alan W. Irwin
email: ir...@be...
phone: 250-727-2902

Astronomical research affiliation with Department of Physics and Astronomy,
University of Victoria (astrowww.phys.uvic.ca).

Programming affiliations with the PLplot scientific plotting software
package (plplot.org), the Yorick front-end to PLplot (yplot.sf.net), the
Loads of Linux Links project (loll.sf.net), and the Linux Brochure Project
(lbproject.sf.net).
__________________________

Linux-powered Science
__________________________

Re: [Plplot-general] contour rendering to PBM, or how to get libpng working on Win32

[Alan W. I. <ir...@be...>]

On 2004-07-01 00:52-0400 John Matthews wrote:

> Quick version:
> 1) PBM driver renders crosshatch pattern in contour plot where PNG
> driver renders patches of color. How to make PBM give the same image as
> PNG?

That's the result of our software fill routine which is pretty lame but
better than nothing.  The software fill kicks in if the device doesn't have
the fill capability at all.  Perhaps more work (or higher resolution) for
the software fill routine would make your results look substantially better,
but other aspects of the PBM results look poor to me as well (again, it may
just be the default resolution) so that whole area of our code probably
needs some maintenance.  If you don't want to do that yourself, then
probably it is best to avoid the PBM device for now.

>
> Or...
> 2) Does anyone have a listing of files and clear instructions to get
> libpng, zlib, and gd all installed and working with plplot on Windows
> 2000 using MinGW/MSYS?

I don't have windows or mingw experience, but others on this list do so I
hope they are able to provide you with some help with libgd on windows.

Alan
__________________________
Alan W. Irwin
email: ir...@be...
phone: 250-727-2902

Astronomical research affiliation with Department of Physics and Astronomy,
University of Victoria (astrowww.phys.uvic.ca).

Programming affiliations with the PLplot scientific plotting software
package (plplot.org), the Yorick front-end to PLplot (yplot.sf.net), the
Loads of Linux Links project (loll.sf.net), and the Linux Brochure Project
(lbproject.sf.net).
__________________________

Linux-powered Science
__________________________

[Plplot-general] building plplot 5.3.1 on slackware 9.1

[Bryan P. <pet...@ma...>]

When I was building plplot 5.3.1 on slackware 9.1 it failed to recognize
the presence of jpeg or png support in libgd (installed separately - not
part of the distribution).  The problem was that the LDFLAGS was set to
blank before checking and the test failed looking for "pow" that was
referenced by both libpng and libjpeg.  Apparently slackware differs from
the others by not having libm in the default link list and you have to
explicitly include -lm when making this test.

Bryan Peterson
bry...@by...

[Plplot-general] contour rendering to PBM, or how to get libpng working on Win32

[John M. <jv...@li...>]

Quick version:
1) PBM driver renders crosshatch pattern in contour plot where PNG
driver renders patches of color. How to make PBM give the same image as
PNG?

Or...
2) Does anyone have a listing of files and clear instructions to get
libpng, zlib, and gd all installed and working with plplot on Windows
2000 using MinGW/MSYS?

Longer version:
I apologize in advance if I've missed this in the documentation
somewhere (and in the source, where I poked around for a bit).

I've currently got this very hacky plplot code that renders some data as
a contour plot to an image file which is then read in from the
filesystem by another part of the program for rendering on the screen.
Ugly, yes. But it works.

On Linux, I use PNG to accomplish this, and it works.

I need the same application to work in Windows, but I can't seem to get
libpng, zlib, and gd to play ball. (I finally got it down to the point
where configure said that my gd DLL didn't support PNG or JPG, which the
site that provided the binary DLL claims it does, and I gave up.)

So I figured since PBM appears supported, why not use that instead?

The problem is that I get a crosshatch pattern instead of solid color
patches for my contour plot, which makes it nigh useless, since the
"weave" of the crosshatching is so wide.

Nothing else changed in *my* code except to change the driver from PNG
to PBM (two lines, one to set the driver and one to set the filename),
so there must be something I need to know about the PBM driver to make
it perform as the PNG one does.

Having taken the code back from Windows to Linux, I see it behaves
precisely the same way, so it isn't some freaking Windows-specific
issue.

Many thanks in advance for any help you've got. :^)

Regards,
matt

[Plplot-general] PLplot 5.3.1 is released

[Alan W. I. <ir...@be...>]

I am happy to announce the release of PLplot version 5.3.1 which supersedes
all previous versions of this scientific plotting package.  Get the tarball
and detached signature file (plplot-5.3.1.tar.gz and
plplot-5.3.1.tar.gz.asc) at the usual place
(http://sourceforge.net/project/showfiles.php?group_id=2915).  To verify
your downloads use the "gpg --verify plplot-5.3.1.tar.gz.asc" command.

Rafael Laboissiere, our release manager, is still working on the formal
announcement of this latest release, but for now a quick summary of the
changes since 5.3.0 is as follows:

     * New API functions: plvect, plsvect, plsurf3dl, and plot3dcl  (the first
       two help plot vector fields, the third implements non-rectangular
       boundaries for plsurf, and the fourth is API to do the same for plot3dc
       without the details implemented as yet.)
     * Memory leak fixes
     * Octave bindings and demos work for Octave 2.1.57
     * Java binding improvements
     * Freetype fixes
     * DJGPP updated
     * New driver wingcc for Mingw Unix platform
     * New chapters in the manual: "Deploying programs that use PLplot" and
       "API compatibility definition"
     * All examples ported to the PerlDL bindings
     * make check now works in the build tree
     * Reorganization of configuration files under cf/

For a more detailed list of the 369 commits since 5.3.0 see
http://plplot.sourceforge.net/announce/ChangeLog-5.3.0-5.3.1.

Enjoy this new stable version of PLplot!

Alan W. Irwin on behalf of our release manager, Rafael Laboissiere, and the
rest of the PLplot development team.

__________________________
Alan W. Irwin
email: ir...@be...
phone: 250-727-2902

Astronomical research affiliation with Department of Physics and Astronomy,
University of Victoria (astrowww.phys.uvic.ca).

Programming affiliations with the PLplot scientific plotting software
package (plplot.org), the Yorick front-end to PLplot (yplot.sf.net), the
Loads of Linux Links project (loll.sf.net), and the Linux Brochure Project
(lbproject.sf.net).
__________________________

Linux-powered Science
__________________________