gnuplot-info — For questions and discussion about gnuplot

[Gnuplot-info] License with regards to binary distribution

[Chris D. <chr...@gm...>]

Hi, 

Just wanted to confirm my understanding on the license, which you can
read here:
http://gnuplot.cvs.sourceforge.net/gnuplot/gnuplot/Copyright?view=markup

> * Permission to use, copy, and distribute this software and its
> * documentation for any purpose with or without fee is hereby granted,
> * provided that the above copyright notice appear in all copies and
> * that both that copyright notice and this permission notice appear
> * in supporting documentation.

Can I produce a binary from the official source, unmodified and
distribute that binary, excluding any source code, provided the
copyright notice is included in that distribution?

In other words, suppose I were to write a program which depends upon
gnuplot, and I need to distribute my program along with gnuplot as its
dependency, can I just include it as-is?

And if I were to use a modified distribution version, e.g. of Ubuntu, I
would include the copyright notice and version information from the
Ubuntu version to clearly mark that this is a modified binary. Correct?

Cheers!

[Gnuplot-info] Issue with "image" plot function and incomplete matrix

[<jac...@fr...>]

Hi,

I am using GNUplot Version 4.6 patchlevel 4.
I would like to create a "false" 3D graph: a 2D graph with a color as Z entry.
I find that it could be done easily with "image" keyword (http://gnuplot.sourceforge.net/demo/heatmaps.html)

But my data are not a perfect and simple matrix.
In this case, GNUplot interpolate the data and graph sometime a parallelogram instead of a square...
I would like that nothing is displayed when the point "does not exist" in the matrix.

See 2 following examples, where the graph obtained are false ;-(

How can I correct this ?
Should I use something else than "plot w image" ?

Example 1:
Issue: the yellow square is centered in (2 ; 9) instead of (2 ; 11 )
plot '-' using 1:2:3  with image
1  1  1
1  2  2
1  3  3
1  4  4
1  5  5
1  6  6
1  7  7

2  1  2
2  2  3
2  3  4
2  8  5
2  9  6
2  10 7
2  11 8
e



Example 2:
Issue: the yellow parallelogram is centered in (2 ; 9) instead of (2 ; 11 )
plot '-' using 1:2:3  with image
1  1  1
1  2  2
1  3  3
1  4  4
1  5  5
1  6  6
1  7  7

2  3  2
2  4  3
2  5  4
2  8  5
2  9  6
2  10 7
2  11 8
e

Thanks,
Jacques

[Gnuplot-info] Binary file plotting

[Amol H. <am...@gm...>]

Dear All,

I am just wondering how to write a multi-column binary file in C++ which
can be plotted by gnuplot.

Thanks in advance.

Amol

Re: [Gnuplot-info] Fw: Asking a question about gnuplot

[Hans-Bernhard B. <HBB...@t-...>]

On 05.02.2014 21:30, Hamed Ahmadi wrote:

> I have a data file as matrix form.

As far as gnuplot's use of the term is concerned, that sentence directly 
contradicts the following two:

 > The values on the x axis are in
> the first row of this file. The y values  corresponding to the x
> values are on the following rows.

A file in that format is not in matrix form as understood by gnuplot.

Your data file format is not really usable by gnuplot as-is.  If at all 
possible, you should transpose it, i.e. make columns out of rows and 
vice versa.  Then a simple

     plot 'filename' using 1:3

will display what you want.

[Gnuplot-info] Fw: Asking a question about gnuplot

[Hamed A. <s.h...@ya...>]

Hi,


I have a data file as matrix form. The values on the x axis are in the first row of this file. The y values  corresponding to the x values are on the following rows.  I want, for example, plot the second row respect to  the first row (first row on the x axis and the second row on the y axis), but i do not know how to do that.
I use, for example this command "plot "filename" matrix using 1:3 every :::1::1" which plot second row but with its arbitrary x values. I want to use first row as x values. My data file looks like this:
First row:            x1    x2     x3     x4    .....
Second row:      y1    y2     y3      y4     ......
(y1 corresponds to x1 and y2 to x2 and etc.)


Thanks,

Re: [Gnuplot-info] wxGtk crash on haswell

[Frantisek K. <fkl...@re...>]

The crash disappeared with #define WXT_MONOTHREADED.
gnuplot plot
gnuplot -p plot
gnuplot <<< "load 'plot'"
all work now.

Thanks.

On 02/03/2014 07:22 PM, Ethan Merritt wrote:
> The following code appears in .../src/wxterminal/wxt_gui.h
>
> /* depending on the platform, and mostly because of the Windows terminal
> which
>   * already has its event loop, we may or may not be multithreaded */
> #if defined(__WXGTK__)
> # define WXT_MULTITHREADED
> #elif defined(__WXMSW__) || defined(__WXMAC__)
> # define WXT_MONOTHREADED
> #else
> # error "wxt does not know if this platform has to be mono- or
> multi-threaded"
> #endif
>
> On linux this normally results in the MULTITHREADED option being chosen.
>    Could you please try forcing the MONOTHREADED option instead and
> reporting back whether that fixes your problem?
>
>       (haven't yet acquired any Haswell machines to test on)
>
>                   Ethan
>
>
>
> On Mon, Feb 3, 2014 at 9:30 AM, Frantisek Kluknavsky
> <fkl...@re... <mailto:fkl...@re...>> wrote:
>
>     Hi,
>
>     wxt terminal always crashes on a haswell machine. It works reliably on
>     older ivy bridge. It seems like wxt terminal on several places unlocks
>     mutexes which are not locked. That combined with XBEGIN/XEND
>     instructions on haswell produces a crash in glibc.
>
>     wxwidgets documentation
>     (http://docs.wxwidgets.org/stable/group__group__funcmacro__thread.html#ga6671c1599fd4ccf6a7c7bb90b2304709)
>     says:
>     void wxMutexGuiEnter
>     Note
>           Under GTK, no creation of top-level windows is allowed in any
>     thread but the main one. [1]
>
>
>     Gnuplot source (gnuplot-4.6.3/src/wxterminal/wxt_gui.cpp:222) says:
>     /* Workaround for a deadlock when the main thread will Wait() for
>     this one.
>        * This issue comes from the fact that our gui main loop is not in the
>        * main thread as wxWidgets was written for. */
>     wxt_MutexGuiLeave();
>
>     This is not the only place where a crash occurs. It depends on whether
>     gnuplot runs with -p argument and whether it gets the plot command as a
>     command line argument or interactively, but there is always some extra
>     unlocking somewhere.
>
>     Is it possible to run Gnuplot with gtk as a wxWidgets backend?
>
>     Thanks.
>
>     Fero
>
>     PS: My system is Fedora 20
>     Thread no. 1 (8 frames)
>        #0 _xend at ../nptl/sysdeps/unix/sysv/linux/x86/elision-unlock.c:33
>        #1 __lll_unlock_elision at
>     ../nptl/sysdeps/unix/sysv/linux/x86/elision-unlock.c:29
>        #2 wxMutexInternal::Unlock at src/unix/threadpsx.cpp:297
>        #3 wxMutex::Unlock at include/wx/thrimpl.cpp:60
>        #4 wxMutexGuiLeave at src/unix/threadpsx.cpp:1737
>        #5 wxt_MutexGuiLeave at ../../src/wxterminal/wxt_gui.cpp:3671
>        #6 wxtThread::Entry at ../../src/wxterminal/wxt_gui.cpp:222
>        #7 wxThreadInternal::PthreadStart at src/unix/threadpsx.cpp:766
>
>     ------------------------------------------------------------------------------
>     Managing the Performance of Cloud-Based Applications
>     Take advantage of what the Cloud has to offer - Avoid Common Pitfalls.
>     Read the Whitepaper.
>     http://pubads.g.doubleclick.net/gampad/clk?id=121051231&iu=/4140/ostg.clktrk
>     _______________________________________________
>     gnuplot-info mailing list
>     gnu...@li...
>     <mailto:gnu...@li...>
>     Membership management via:
>     https://lists.sourceforge.net/lists/listinfo/gnuplot-info
>
>

Re: [Gnuplot-info] wxGtk crash on haswell

[Ethan M. <eam...@gm...>]

The following code appears in .../src/wxterminal/wxt_gui.h

/* depending on the platform, and mostly because of the Windows terminal
which
 * already has its event loop, we may or may not be multithreaded */
#if defined(__WXGTK__)
# define WXT_MULTITHREADED
#elif defined(__WXMSW__) || defined(__WXMAC__)
# define WXT_MONOTHREADED
#else
# error "wxt does not know if this platform has to be mono- or
multi-threaded"
#endif

On linux this normally results in the MULTITHREADED option being chosen.
Could you please try forcing the MONOTHREADED option instead and reporting
back whether that fixes your problem?

     (haven't yet acquired any Haswell machines to test on)

                 Ethan



On Mon, Feb 3, 2014 at 9:30 AM, Frantisek Kluknavsky <fkl...@re...>wrote:

> Hi,
>
> wxt terminal always crashes on a haswell machine. It works reliably on
> older ivy bridge. It seems like wxt terminal on several places unlocks
> mutexes which are not locked. That combined with XBEGIN/XEND
> instructions on haswell produces a crash in glibc.
>
> wxwidgets documentation
> (
> http://docs.wxwidgets.org/stable/group__group__funcmacro__thread.html#ga6671c1599fd4ccf6a7c7bb90b2304709
> )
> says:
> void wxMutexGuiEnter
> Note
>      Under GTK, no creation of top-level windows is allowed in any
> thread but the main one. [1]
>
>
> Gnuplot source (gnuplot-4.6.3/src/wxterminal/wxt_gui.cpp:222) says:
> /* Workaround for a deadlock when the main thread will Wait() for this one.
>   * This issue comes from the fact that our gui main loop is not in the
>   * main thread as wxWidgets was written for. */
> wxt_MutexGuiLeave();
>
> This is not the only place where a crash occurs. It depends on whether
> gnuplot runs with -p argument and whether it gets the plot command as a
> command line argument or interactively, but there is always some extra
> unlocking somewhere.
>
> Is it possible to run Gnuplot with gtk as a wxWidgets backend?
>
> Thanks.
>
> Fero
>
> PS: My system is Fedora 20
> Thread no. 1 (8 frames)
>   #0 _xend at ../nptl/sysdeps/unix/sysv/linux/x86/elision-unlock.c:33
>   #1 __lll_unlock_elision at
> ../nptl/sysdeps/unix/sysv/linux/x86/elision-unlock.c:29
>   #2 wxMutexInternal::Unlock at src/unix/threadpsx.cpp:297
>   #3 wxMutex::Unlock at include/wx/thrimpl.cpp:60
>   #4 wxMutexGuiLeave at src/unix/threadpsx.cpp:1737
>   #5 wxt_MutexGuiLeave at ../../src/wxterminal/wxt_gui.cpp:3671
>   #6 wxtThread::Entry at ../../src/wxterminal/wxt_gui.cpp:222
>   #7 wxThreadInternal::PthreadStart at src/unix/threadpsx.cpp:766
>
>
> ------------------------------------------------------------------------------
> Managing the Performance of Cloud-Based Applications
> Take advantage of what the Cloud has to offer - Avoid Common Pitfalls.
> Read the Whitepaper.
>
> http://pubads.g.doubleclick.net/gampad/clk?id=121051231&iu=/4140/ostg.clktrk
> _______________________________________________
> gnuplot-info mailing list
> gnu...@li...
> Membership management via:
> https://lists.sourceforge.net/lists/listinfo/gnuplot-info
>

[Gnuplot-info] wxGtk crash on haswell

[Frantisek K. <fkl...@re...>]

Hi,

wxt terminal always crashes on a haswell machine. It works reliably on 
older ivy bridge. It seems like wxt terminal on several places unlocks 
mutexes which are not locked. That combined with XBEGIN/XEND 
instructions on haswell produces a crash in glibc.

wxwidgets documentation 
(http://docs.wxwidgets.org/stable/group__group__funcmacro__thread.html#ga6671c1599fd4ccf6a7c7bb90b2304709) 
says:
void wxMutexGuiEnter
Note
     Under GTK, no creation of top-level windows is allowed in any 
thread but the main one. [1]


Gnuplot source (gnuplot-4.6.3/src/wxterminal/wxt_gui.cpp:222) says:
/* Workaround for a deadlock when the main thread will Wait() for this one.
  * This issue comes from the fact that our gui main loop is not in the
  * main thread as wxWidgets was written for. */
wxt_MutexGuiLeave();

This is not the only place where a crash occurs. It depends on whether 
gnuplot runs with -p argument and whether it gets the plot command as a 
command line argument or interactively, but there is always some extra 
unlocking somewhere.

Is it possible to run Gnuplot with gtk as a wxWidgets backend?

Thanks.

Fero

PS: My system is Fedora 20
Thread no. 1 (8 frames)
  #0 _xend at ../nptl/sysdeps/unix/sysv/linux/x86/elision-unlock.c:33
  #1 __lll_unlock_elision at 
../nptl/sysdeps/unix/sysv/linux/x86/elision-unlock.c:29
  #2 wxMutexInternal::Unlock at src/unix/threadpsx.cpp:297
  #3 wxMutex::Unlock at include/wx/thrimpl.cpp:60
  #4 wxMutexGuiLeave at src/unix/threadpsx.cpp:1737
  #5 wxt_MutexGuiLeave at ../../src/wxterminal/wxt_gui.cpp:3671
  #6 wxtThread::Entry at ../../src/wxterminal/wxt_gui.cpp:222
  #7 wxThreadInternal::PthreadStart at src/unix/threadpsx.cpp:766

Re: [Gnuplot-info] Wxt terminal hanging on OS X with gnuplot 4.6

[Craig D. <def...@bo...>]

It may be a problem with the wxt libraries.  I have yet to get them working reliably since upgrading to mavericks...

(Mobile)


> On Feb 2, 2014, at 12:45 PM, Cássio M. M. Pereira <cas...@gm...> wrote:
> 
> Hi,
> 
> I'm running gnuplot 4.6 patchlevel 3 on OS X 10.9.1, installed via homebrew.
> 
> Whenever I try to plot using the wxt terminal, gnuplot hangs and the
> only way to quit it is by killing the process.
> 
> Plotting on the x11 terminal works, but it's very low resolution if
> compared to wxt.
> 
> Any ideas why this might be happening? There are no visible error messages.
> 
> I tried compiling from source manually, but the results are the same
> as with the homebrew install.
> 
> Thanks,
> Cássio
> 
> ------------------------------------------------------------------------------
> WatchGuard Dimension instantly turns raw network data into actionable 
> security intelligence. It gives you real-time visual feedback on key
> security issues and trends.  Skip the complicated setup - simply import
> a virtual appliance and go from zero to informed in seconds.
> http://pubads.g.doubleclick.net/gampad/clk?id=123612991&iu=/4140/ostg.clktrk
> _______________________________________________
> gnuplot-info mailing list
> gnu...@li...
> Membership management via: https://lists.sourceforge.net/lists/listinfo/gnuplot-info
> 

[Gnuplot-info] Wxt terminal hanging on OS X with gnuplot 4.6

[Cássio M. M. P. <cas...@gm...>]

Hi,

I'm running gnuplot 4.6 patchlevel 3 on OS X 10.9.1, installed via homebrew.

Whenever I try to plot using the wxt terminal, gnuplot hangs and the
only way to quit it is by killing the process.

Plotting on the x11 terminal works, but it's very low resolution if
compared to wxt.

Any ideas why this might be happening? There are no visible error messages.

I tried compiling from source manually, but the results are the same
as with the homebrew install.

Thanks,
Cássio

Re: [Gnuplot-info] missing data = empty string ?

[Ethan M. <eam...@gm...>]

On Saturday, 25 January 2014 08:45:08 AM Theo wrote:
> 
> will this be fixed in gnuplot 4.7 or later?
> 
>  > You have found a bug.
> > The problem is specifically the row that has an empty field in the first
> > column.  All the other empty fields are correctly recognized but that one
> > is not.
> >
> > I don't have an immediate work-around to offer but I'm sure it's fixable.


The fix will be in 4.6.5 when it is released - maybe next month.

	Ethan

Re: [Gnuplot-info] missing data = empty string ?

[Theo <th...@gm...>]

will this be fixed in gnuplot 4.7 or later?

 > You have found a bug.
> The problem is specifically the row that has an empty field in the first
> column.  All the other empty fields are correctly recognized but that one
> is not.
>
> I don't have an immediate work-around to offer but I'm sure it's fixable.
>

[Gnuplot-info] heat map color palette and tic size

[janjust <tja...@un...>]

I am generating heat-maps and I'm confused as to how the color palette for
the cbrange works.

How does one set lower and upper colors including the nuances?
I know there are preset values that I can set , but can I set these myself?
If so, can I pick a color for lower-mid-upper range or a combination
thereof? 

Also, how do I manipulate the tic size? that is to say can I fill the size
of each area that a color shade occupies? the default is a skim line that
stretches depending on the size of my x-range.

My script is simple, and is as follows:

  1 set term postscript eps color font "Helvetica,8" size 7.0, 4.0
  2 set output "filterp.eps"
  3 set title "sizeof(filterp) = 4976bytes"
  4
  5 set tic scale 1
  6 set palette rgbformulae 32,3,5
  7 set palette negative
  8
  9 set grid
 10 set cbrange [0:1]
 11 set cblabel "references"
 12 #set cbtics 1
 13
 14 set xrange [-0.5:-0.5]
 15 set xtics
 16 set yrange [-0.5:1244]
 17 set ytics 1024
 18
 19 set view map
 20
 21 set xlabel "tics"
 22 set ylabel "sizeof(filterp)"
 23
 24 plot 'filterp.dat' using 1:2:3 with image
~

Any tips and tricks are much appreciated!!!




 



--
View this message in context: http://gnuplot.10905.n7.nabble.com/heat-map-color-palette-and-tic-size-tp17920.html
Sent from the Gnuplot - User mailing list archive at Nabble.com.

Re: [Gnuplot-info] Plot command with '-' and '' using same data

[Ethan A M. <eam...@gm...>]

On Thursday, 23 January 2014 01:07:39 AM Tait wrote:
> The '' syntax re-uses the file name, not the file data. With a normal
> file the '' actually re-reads the file again, which is why when gnuplot
> goes to re-read from inline you must re-supply the data. To reuse the
> file's data, gnuplot would obviously have to cache it, and that is
> impractical or impossible for large data sets.
> 
> I think I recall some discussion along the lines of implementing a named
> data store feature that would explicitly instruct gnuplot to cache a
> particular (potentially inline) data set, but I'm not sure whether it
> was completed.

Correct.
In 4.7 you can provide named data blocks.

gnuplot> help inline
 There are two mechanisms for embedding data into a stream of gnuplot commands.
 If the special filename '-' appears in a plot command, then the lines
 immediately following the plot command are interpreted as inline data.
 See `special-filenames`.  Data provided in this way can only be used once, by
 the plot command it follows.

 The second mechanism defines a named data block as a here-document.  The named
 data is persistent and may be referred to by more than one plot command.
 Example:
      $Mydata << EOD
      11 22 33 first line of data
      44 55 66 second line of data
      # comments work just as in a data file
      77 88 99
      EOD
      stats $Mydata using 1:3
      plot $Mydata using 1:3 with points, $Mydata using 1:2 with impulses

 Data block names must begin with a $ character, which distinguishes them from
 other types of persistent variables.  The end-of-data delimiter (EOD in the
 example) may be any sequence of alphanumeric characters.

               Ethan


> 
> To only type in the data once, put it into a regular file with the
> appropriate format, and reference it by its file name.
> 
> Theo <th...@gm...> said (on 2014/01/22):
> > Hi there,
> > 
> > if I want to include (for some special reason) data into the plotting 
> > file itself I can use the special filename '-' and write the data in the 
> > plot file...
> > 
> > Why can't I use the same data twice? Can anybody explain?
> > Is there a way that I have to type in the data only once?
> 
> ------------------------------------------------------------------------------
> CenturyLink Cloud: The Leader in Enterprise Cloud Services.
> Learn Why More Businesses Are Choosing CenturyLink Cloud For
> Critical Workloads, Development Environments & Everything In Between.
> Get a Quote or Start a Free Trial Today. 
> http://pubads.g.doubleclick.net/gampad/clk?id=119420431&iu=/4140/ostg.clktrk
> _______________________________________________
> gnuplot-info mailing list
> gnu...@li...
> Membership management via: https://lists.sourceforge.net/lists/listinfo/gnuplot-info

Re: [Gnuplot-info] Plot command with '-' and '' using same data

[Theo <th...@gm...>]

Thank you for your explanations.
That's a pity. I didn't want to attach a lot of small separate data 
files to the plotting file. Although it might be possible to somehow 
pack the different smaller datasets in one file but it will not be 
convenient for plotting.

Another approach: Like the variable in gnuplot, can single column data 
be defined in an inline array?
e.g. 'MyValue=3.141' and 'MyArray'=(10,20,30,40,50)
Is this what you meant with "named data store"?


Am 23.01.2014 02:07, schrieb Tait:
> The '' syntax re-uses the file name, not the file data. With a normal
> file the '' actually re-reads the file again, which is why when gnuplot
> goes to re-read from inline you must re-supply the data. To reuse the
> file's data, gnuplot would obviously have to cache it, and that is
> impractical or impossible for large data sets.
>
> I think I recall some discussion along the lines of implementing a named
> data store feature that would explicitly instruct gnuplot to cache a
> particular (potentially inline) data set, but I'm not sure whether it
> was completed.
>
> To only type in the data once, put it into a regular file with the
> appropriate format, and reference it by its file name.
>
> Theo <th...@gm...> said (on 2014/01/22):
>> Hi there,
>>
>> if I want to include (for some special reason) data into the plotting
>> file itself I can use the special filename '-' and write the data in the
>> plot file...
>>
>> Why can't I use the same data twice? Can anybody explain?
>> Is there a way that I have to type in the data only once?
>
> ------------------------------------------------------------------------------
> CenturyLink Cloud: The Leader in Enterprise Cloud Services.
> Learn Why More Businesses Are Choosing CenturyLink Cloud For
> Critical Workloads, Development Environments & Everything In Between.
> Get a Quote or Start a Free Trial Today.
> http://pubads.g.doubleclick.net/gampad/clk?id=119420431&iu=/4140/ostg.clktrk
> _______________________________________________
> gnuplot-info mailing list
> gnu...@li...
> Membership management via: https://lists.sourceforge.net/lists/listinfo/gnuplot-info
>

Re: [Gnuplot-info] Plot command with '-' and '' using same data

[Tait <gnu...@t4...>]

The '' syntax re-uses the file name, not the file data. With a normal
file the '' actually re-reads the file again, which is why when gnuplot
goes to re-read from inline you must re-supply the data. To reuse the
file's data, gnuplot would obviously have to cache it, and that is
impractical or impossible for large data sets.

I think I recall some discussion along the lines of implementing a named
data store feature that would explicitly instruct gnuplot to cache a
particular (potentially inline) data set, but I'm not sure whether it
was completed.

To only type in the data once, put it into a regular file with the
appropriate format, and reference it by its file name.

Theo <th...@gm...> said (on 2014/01/22):
> Hi there,
> 
> if I want to include (for some special reason) data into the plotting 
> file itself I can use the special filename '-' and write the data in the 
> plot file...
> 
> Why can't I use the same data twice? Can anybody explain?
> Is there a way that I have to type in the data only once?

[Gnuplot-info] Plot command with '-' and '' using same data

[Theo <th...@gm...>]

Hi there,

if I want to include (for some special reason) data into the plotting 
file itself I can use the special filename '-' and write the data in the 
plot file, e.g.:

plot '-' u 0:1 w l lc 1
10
20
30
40
e

If I want to use the data twice and modify it in the second plot I 
thought that I can use the special filename '', which according to the 
manual should "...re-use the previous input file in the same plot command."
The previous input file is '-'. As I understand this data should be re-used.

Factor=1.234
Offset=9.876
plot '-' u 0:1 w l lc 1, '' u 0:($1*Factor+Offset) w l lc 2
10
20
30
40
e

But it doesn't.
I get the message "warning: Skipping data file with no valid points"
Obviously, I have to type in the same data twice:

Factor=1.234
Offset=9.876
plot '-' u 0:1 w l lc 1, '' u 0:($1*Factor+Offset) w l lc 2
10
20
30
40
e
10
20
30
40
e

Why can't I use the same data twice? Can anybody explain?
Is there a way that I have to type in the data only once?

Re: [Gnuplot-info] trouble protting timediff

[walter h. <wh...@bf...>]

Am 21.01.2014 12:43, schrieb Thomas Sefzick:
> walter harms <wharms <at> bfs.de> writes:
> 
>> the idea here was to plot the time difference ($2-$1) vs value (3).
>> The results are confusing and i have no idea what the problem may be
>> (me or gnuplot).
>> the x-axes i see is 0 0 1 1 2 2 3
>> but i expected to see the time difference in seconds.
>> ...
>> note: this is a simplified example
>>
>> # from          to     value
>>   1990-01     1990-06   27
>>   1990-01     1991-12   35
>>   1989-12     1992-01   22
>>
>> set timefmt "%Y-%m"
>> set xdata time
>> set format x "%s"   # seconds to illustrate the problem
>> plot "test.dat" using ($2-$1):3 with p ps 2 pt 5
> 
> "$2" doesn't work for time data, use the "timecolumn(2)"
> function instead.
> 
> plot "test.dat" using (timecolumn(2)-timecolumn(1)):3 with p ps 2 pt 5
> 
> should work
> 
> 


works much better,
That should  be mentioned in time/date help !

re,
 wh

Re: [Gnuplot-info] trouble protting timediff

[Thomas S. <t.s...@fz...>]

walter harms <wharms <at> bfs.de> writes:

> the idea here was to plot the time difference ($2-$1) vs value (3).
> The results are confusing and i have no idea what the problem may be
> (me or gnuplot).
> the x-axes i see is 0 0 1 1 2 2 3
> but i expected to see the time difference in seconds.
> ...
> note: this is a simplified example
> 
> # from          to     value
>   1990-01     1990-06   27
>   1990-01     1991-12   35
>   1989-12     1992-01   22
> 
> set timefmt "%Y-%m"
> set xdata time
> set format x "%s"   # seconds to illustrate the problem
> plot "test.dat" using ($2-$1):3 with p ps 2 pt 5

"$2" doesn't work for time data, use the "timecolumn(2)"
function instead.

plot "test.dat" using (timecolumn(2)-timecolumn(1)):3 with p ps 2 pt 5

should work

[Gnuplot-info] trouble protting timediff

[walter h. <wh...@bf...>]

hi list,
the idea here was to plot the time difference ($2-$1) vs value (3).
The results are confusing and i have no idea what the problem may be
(me or gnuplot).
the x-axes i see is 0 0 1 1 2 2 3
but i expected to see the time difference in seconds.

note: yes i can preprocess that file and use seconds in the first place
      but i would like to understand what is going on here

note: this is a simplified example

# from          to     value
  1990-01     1990-06   27
  1990-01     1991-12   35
  1989-12     1992-01   22


set timefmt "%Y-%m"
set xdata time
set format x "%s"   # seconds to illustrate the problem
plot "test.dat" using ($2-$1):3 with p ps 2 pt 5

Re: [Gnuplot-info] Enhanced-escape bug (at least 8 years old)...

[Craig D. <def...@bo...>]

Ah.  Sorry, I completely misunderstood the nature of the double-quotes in question -- I assumed they were in some shell command.  In the past (and earlier versions of gnuplot) I've had trouble on occasion using single quotes and just emitted double-quotes for everything. 

Thanks for the clarification.

Cheers,
Craig



On Jan 20, 2014, at 6:33 PM, Ethan A Merritt <EAM...@gm...> wrote:

> On Monday, 20 January 2014 05:41:04 PM Craig DeForest wrote:
>> In enhanced-mode, escaped characters such as ampersand require not one escape but two.  
>> For example, the string 'S\&P 500' renders as "S P 500" in a title.  
> 
> I think you will find that is not quite true. 
> The single-quoted string you show will print as S&P 500.
> It would act as you show if the string were in double-quotes.
> 
>> The string 'S\\&P 500' renders correctly.  This is reproducible with pdf, eps, and all the cairo terminals.
> 
> Again true for double-quotes but not for single-quotes.
> 
> 
>> I googled for the problem, and found this thread 
>> ("http://comp.graphics.apps.gnuplot.narkive.com/GtFk5Tfg/ampersand-in-title")
>> from 8 years ago, complete with in-character comments from both Juergen and Ethan.
>> As far as I can tell, the behavior has been neither documented nor repaired in that time.  
> 
> It is documented under "help enhanced" and "help quotes".
> Those bits may have been added in response to that query 8 years ago.
> I don't recall.
> 
>> Or is it now established behavior that instead needs to be documented?
> 
> It is an integral part of the enhanced text processing.
> The same is true for all the special characters:   & _ ^ @ ~
> 
> The suggestions in that thread from 8 years ago are still valid.
> You have the options:
> 
> - Turn off enhanced mode
> or
> - Use single quotes and a single backslash to escape each special character
> or
> - Use double quotes and two backslashes to escape each special character
> or
> - (kind of obscure but nonetheless "correct" if you are in a UTF-8 locale) 
>  use the character at unicode FF06   ＆
>  instead of the one at unicode 0026  &
> 
>> Is this something about which a patch would be welcome? 
> 
> A patch to do what, exactly?
> Maybe each of the enhanced text markup characters should 
> have its own help index entry?
> 
> 	Ethan
> 	
> 
>> Cheers,
>> Craig
>> 
>> 
>> ------------------------------------------------------------------------------
>> CenturyLink Cloud: The Leader in Enterprise Cloud Services.
>> Learn Why More Businesses Are Choosing CenturyLink Cloud For
>> Critical Workloads, Development Environments & Everything In Between.
>> Get a Quote or Start a Free Trial Today. 
>> http://pubads.g.doubleclick.net/gampad/clk?id=119420431&iu=/4140/ostg.clktrk
>> _______________________________________________
>> gnuplot-info mailing list
>> gnu...@li...
>> Membership management via: https://lists.sourceforge.net/lists/listinfo/gnuplot-info
> 
> 

Re: [Gnuplot-info] Enhanced-escape bug (at least 8 years old)...

[Ethan A M. <eam...@gm...>]

On Monday, 20 January 2014 05:41:04 PM Craig DeForest wrote:
> In enhanced-mode, escaped characters such as ampersand require not one escape but two.  
> For example, the string 'S\&P 500' renders as "S P 500" in a title.  

I think you will find that is not quite true. 
The single-quoted string you show will print as S&P 500.
It would act as you show if the string were in double-quotes.

> The string 'S\\&P 500' renders correctly.  This is reproducible with pdf, eps, and all the cairo terminals.

Again true for double-quotes but not for single-quotes.

 
> I googled for the problem, and found this thread 
> ("http://comp.graphics.apps.gnuplot.narkive.com/GtFk5Tfg/ampersand-in-title")
> from 8 years ago, complete with in-character comments from both Juergen and Ethan.
> As far as I can tell, the behavior has been neither documented nor repaired in that time.  

It is documented under "help enhanced" and "help quotes".
Those bits may have been added in response to that query 8 years ago.
I don't recall.

> Or is it now established behavior that instead needs to be documented?

It is an integral part of the enhanced text processing.
The same is true for all the special characters:   & _ ^ @ ~

The suggestions in that thread from 8 years ago are still valid.
You have the options:

- Turn off enhanced mode
or
- Use single quotes and a single backslash to escape each special character
or
- Use double quotes and two backslashes to escape each special character
or
- (kind of obscure but nonetheless "correct" if you are in a UTF-8 locale) 
  use the character at unicode FF06   ＆
  instead of the one at unicode 0026  &
 
> Is this something about which a patch would be welcome? 

A patch to do what, exactly?
Maybe each of the enhanced text markup characters should 
have its own help index entry?

	Ethan
	

> Cheers,
> Craig
> 
> 
> ------------------------------------------------------------------------------
> CenturyLink Cloud: The Leader in Enterprise Cloud Services.
> Learn Why More Businesses Are Choosing CenturyLink Cloud For
> Critical Workloads, Development Environments & Everything In Between.
> Get a Quote or Start a Free Trial Today. 
> http://pubads.g.doubleclick.net/gampad/clk?id=119420431&iu=/4140/ostg.clktrk
> _______________________________________________
> gnuplot-info mailing list
> gnu...@li...
> Membership management via: https://lists.sourceforge.net/lists/listinfo/gnuplot-info

[Gnuplot-info] Enhanced-escape bug (at least 8 years old)...

[Craig D. <def...@bo...>]

In enhanced-mode, escaped characters such as ampersand require not one escape but two.  For example, the string 'S\&P 500' renders as "S P 500" in a title.  The string 'S\\&P 500' renders correctly.  This is reproducible with pdf, eps, and all the cairo terminals.

I googled for the problem, and found this thread ("http://comp.graphics.apps.gnuplot.narkive.com/GtFk5Tfg/ampersand-in-title") from 8 years ago, complete with in-character comments from both Juergen and Ethan.  As far as I can tell, the behavior has been neither documented nor repaired in that time.  

Is this something about which a patch would be welcome?  Or is it now established behavior that instead needs to be documented?

Cheers,
Craig

Re: [Gnuplot-info] How to get graph coordinate?

[Hans-Bernhard B. <HBB...@t-...>]

On 08.01.2014 10:54, smms wrote:
> I have seven plots each with different x and y ranges. I need to put a
> vertical line in each plot at a fixed graph coordinate.

So why don't you do just that: set your arrows entirely in graph 
coordinates?

set arrow from graph 0.3, graph 0 to graph 0.3, graph 1 nohead

Re: [Gnuplot-info] quality of fill pattern from one term to another

[BBands <bb...@gm...>]

Just as the terminals are different in real life, so too are gnuplot's
virtual versions. (This is a feature, not a bug.) It is often the case
that they are somewhat similar, but experience with the different
terminals is the only workaround I know of.

' help set term' will show a list of terminals for your installation.
' help set term png' will show you the capabilities of the png term
Issuing 'test' for a number of different terms will allow your to
compare their renderings.

set term png
set out 'test.png'
test
set out

    John

On Wed, Jan 8, 2014 at 8:40 AM, Mahmood Naderan <nt_...@ya...> wrote:
> Hello,
> It seems that the fill patterns quality are changed from one terminal to another. For example the
>
>
>    fill pattern 4 lc rgb "black"
>
> on the windows terminal is a thick '\\' shape. However when I set the terminal to
>
>
>    set term post eps enhanced color blacktext size 3.2,2.2 solid "Times-Roman" 12
>
> The pattern is thin '\\' shape.
>
> Is there any workaround for that?