managing graphs

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Am 8 Jun 2006 um 14:46 hat Mario Rodriguez geschrieben:

> 
> > 2. Use Maxima or gnuplot and plot in the default window. Copy the plot to clipboard. 
> > (Rightclick on the icon in the upper left corner -> Options -> Copy to Clipboard)
> > Paste the clipboard graphic into IrfanView (nice freeware) or your favourite software for 
> > graphics and save the picture to a file. IrfanView for example offers a lot of file formats: jpg 
> > in various qualities, png, gif, tif, a lot more.
> > 
> 
> Hello, Volker, Palmira and Roman:
> 
> The following also works, as Roman suggested some days ago:
> 
> 1. In Maxima, type:
>  
> plot2d(sin(x), [x, 0, 2*%pi], 
>   [gnuplot_preamble, "set terminal png;set out 'myplot.png'"])$
> 
> 2. Now, you can't access myplot.png because wgnuplot is locking it; so
> you can ctrl+alt+del and kill the wgnuplot process.
> 
> 3. After that, you can continue working with your Maxima session and
> open myplot.png directly.
> 
> But we don't like this horrendous solution, do we?

No, Mario, I really don't want to recommend such a thing. I have never read such an advice 
in a serious software documentation. 


> The problem here is that in windows, gnuplot is still active after
> making the myplot.png file. I suppose this is an intended behavior,
> since you can move interactively 3d scenes, which is a nice feature.
> 
> Plots in the descriptive package don't have this problem, if you write
> (in windows):
> (%i1) load(descriptive)$
> (%i2) histogram(makelist(gauss(0,1),i,1,200),outputdev="png")$
> you'll get the file in png format without any problems.
> 
> Maybe, a possible solution is to have a global variable, say
> kill_gnuplot: if true, gnuplot is killed after executing its task, and
> not killed otherwise.

1. If you use the plot window as the output terminal ([gnuplot_term,default]) in Windows the 
system call to wgnuplot looks like this:
"wgnuplot.exe gnuplot_command_file.xyz -"

Maxima calls wgnuplot with 
"wgnuplot maxout.gnuplot -"

Important is the '-' at the end. Without you will see the plot window just for a millisecond. It 
keeps the gnuplot-process alive. The process is finished when you close the plot window.

If you try to plot into a png file by using the 'set terminal png' preamble, in Windows you 
have no chance to finish the process, unless you prefer things like Ctrl+Alt+Del. 

2. In the case of [gnuplot_term,ps] the call to wgnuplot has no '-' at the end. So the following 
works:

plot2d(x,[x,0,1],[gnuplot_term,ps],[gnuplot_preamble,"set term png; set out 'D:/test.png'"]);

test.png is not locked, the gnuplot-process is finished. 
So the [gnuplot_term,ps] option can be used, if you wish to plot into a file via a 'set terminal 
png' preamble.

Question: Would this be something to recommend? To set [gnuplot_term,ps] if you want a 
png output?

Remark: In case of gnuplot_term 'ps' there is a second system call from Maxima:
"ghostview view-file"
This has no meaning in Windows, unless ghostview is installed and registered in the search 
path.
In Linux this is different, I suppose. But we are talking about Windows, don't we?

Volker


> I'm not familiar with plot.lisp and a question comes to my mind here:
> would such a thing work in linux?
> 
> Best wishes
> 
> -- 
> Mario Rodriguez Riotorto
> www.biomates.net
> 
> _______________________________________________
> Maxima mailing list
> Maxima at math.utexas.edu
> http://www.math.utexas.edu/mailman/listinfo/maxima



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<div align="left"><font face="Arial" size="2"><span style="font-size:10pt">Am 8 Jun 2006 um 14:46 hat Mario Rodriguez geschrieben:</span></font></div>
<div align="left"><font face="Arial" size="2"><span style="font-size:10pt"><br />
</span></font></div>
<div align="left"><font face="Arial" color="#7f0000" size="2"><span style="font-size:10pt">&gt; </span></font></div>
<div align="left"><font face="Arial" color="#7f0000" size="2"><span style="font-size:10pt">&gt; &gt; 2. Use Maxima or gnuplot and plot in the default window. Copy the plot to clipboard. </span></font></div>
<div align="left"><font face="Arial" color="#7f0000" size="2"><span style="font-size:10pt">&gt; &gt; (Rightclick on the icon in the upper left corner -&gt; Options -&gt; Copy to Clipboard)</span></font></div>
<div align="left"><font face="Arial" color="#7f0000" size="2"><span style="font-size:10pt">&gt; &gt; Paste the clipboard graphic into IrfanView (nice freeware) or your favourite software for </span></font></div>
<div align="left"><font face="Arial" color="#7f0000" size="2"><span style="font-size:10pt">&gt; &gt; graphics and save the picture to a file. IrfanView for example offers a lot of file formats: jpg </span></font></div>
<div align="left"><font face="Arial" color="#7f0000" size="2"><span style="font-size:10pt">&gt; &gt; in various qualities, png, gif, tif, a lot more.</span></font></div>
<div align="left"><font face="Arial" color="#7f0000" size="2"><span style="font-size:10pt">&gt; &gt; </span></font></div>
<div align="left"><font face="Arial" color="#7f0000" size="2"><span style="font-size:10pt">&gt; </span></font></div>
<div align="left"><font face="Arial" color="#7f0000" size="2"><span style="font-size:10pt">&gt; Hello, Volker, Palmira and Roman:</span></font></div>
<div align="left"><font face="Arial" color="#7f0000" size="2"><span style="font-size:10pt">&gt; </span></font></div>
<div align="left"><font face="Arial" color="#7f0000" size="2"><span style="font-size:10pt">&gt; The following also works, as Roman suggested some days ago:</span></font></div>
<div align="left"><font face="Arial" color="#7f0000" size="2"><span style="font-size:10pt">&gt; </span></font></div>
<div align="left"><font face="Arial" color="#7f0000" size="2"><span style="font-size:10pt">&gt; 1. In Maxima, type:</span></font></div>
<div align="left"><font face="Arial" color="#7f0000" size="2"><span style="font-size:10pt">&gt;&#160; </span></font></div>
<div align="left"><font face="Arial" color="#7f0000" size="2"><span style="font-size:10pt">&gt; plot2d(sin(x), [x, 0, 2*%pi], </span></font></div>
<div align="left"><font face="Arial" color="#7f0000" size="2"><span style="font-size:10pt">&gt;&#160;&#160; [gnuplot_preamble, &quot;set terminal png;set out 'myplot.png'&quot;])$</span></font></div>
<div align="left"><font face="Arial" color="#7f0000" size="2"><span style="font-size:10pt">&gt; </span></font></div>
<div align="left"><font face="Arial" color="#7f0000" size="2"><span style="font-size:10pt">&gt; 2. Now, you can't access myplot.png because wgnuplot is locking it; so</span></font></div>
<div align="left"><font face="Arial" color="#7f0000" size="2"><span style="font-size:10pt">&gt; you can ctrl+alt+del and kill the wgnuplot process.</span></font></div>
<div align="left"><font face="Arial" color="#7f0000" size="2"><span style="font-size:10pt">&gt; </span></font></div>
<div align="left"><font face="Arial" color="#7f0000" size="2"><span style="font-size:10pt">&gt; 3. After that, you can continue working with your Maxima session and</span></font></div>
<div align="left"><font face="Arial" color="#7f0000" size="2"><span style="font-size:10pt">&gt; open myplot.png directly.</span></font></div>
<div align="left"><font face="Arial" color="#7f0000" size="2"><span style="font-size:10pt">&gt; </span></font></div>
<div align="left"><font face="Arial" color="#7f0000" size="2"><span style="font-size:10pt">&gt; But we don't like this horrendous solution, do we?</span></font></div>
<div align="left"><font face="Arial" color="#7f0000" size="2"><span style="font-size:10pt"><br />
</span></font></div>
<div align="left"><font face="Arial" size="2"><span style="font-size:10pt">No, Mario, I really don't want to recommend such a thing. I have never read such an advice 
in a serious software documentation. </span></font></div>
<div align="left"><font face="Arial" size="2"><span style="font-size:10pt"><br />
</span></font></div>
<div align="left"><font face="Arial" color="#7f0000" size="2"><span style="font-size:10pt"><br />
</span></font></div>
<div align="left"><font face="Arial" color="#7f0000" size="2"><span style="font-size:10pt">&gt; The problem here is that in windows, gnuplot is still active after</span></font></div>
<div align="left"><font face="Arial" color="#7f0000" size="2"><span style="font-size:10pt">&gt; making the myplot.png file. I suppose this is an intended behavior,</span></font></div>
<div align="left"><font face="Arial" color="#7f0000" size="2"><span style="font-size:10pt">&gt; since you can move interactively 3d scenes, which is a nice feature.</span></font></div>
<div align="left"><font face="Arial" color="#7f0000" size="2"><span style="font-size:10pt">&gt; </span></font></div>
<div align="left"><font face="Arial" color="#7f0000" size="2"><span style="font-size:10pt">&gt; Plots in the descriptive package don't have this problem, if you write</span></font></div>
<div align="left"><font face="Arial" color="#7f0000" size="2"><span style="font-size:10pt">&gt; (in windows):</span></font></div>
<div align="left"><font face="Arial" color="#7f0000" size="2"><span style="font-size:10pt">&gt; (%i1) load(descriptive)$</span></font></div>
<div align="left"><font face="Arial" color="#7f0000" size="2"><span style="font-size:10pt">&gt; (%i2) histogram(makelist(gauss(0,1),i,1,200),outputdev=&quot;png&quot;)$</span></font></div>
<div align="left"><font face="Arial" color="#7f0000" size="2"><span style="font-size:10pt">&gt; you'll get the file in png format without any problems.</span></font></div>
<div align="left"><font face="Arial" color="#7f0000" size="2"><span style="font-size:10pt">&gt; </span></font></div>
<div align="left"><font face="Arial" color="#7f0000" size="2"><span style="font-size:10pt">&gt; Maybe, a possible solution is to have a global variable, say</span></font></div>
<div align="left"><font face="Arial" color="#7f0000" size="2"><span style="font-size:10pt">&gt; kill_gnuplot: if true, gnuplot is killed after executing its task, and</span></font></div>
<div align="left"><font face="Arial" color="#7f0000" size="2"><span style="font-size:10pt">&gt; not killed otherwise.</span></font></div>
<div align="left"><font face="Arial" color="#7f0000" size="2"><span style="font-size:10pt"><br />
</span></font></div>
<div align="left"><font face="Arial" size="2"><span style="font-size:10pt">1. If you use the plot window as the output terminal ([gnuplot_term,default]) in Windows the 
system call to wgnuplot looks like this:</span></font></div>
<div align="left"><font face="Arial" size="2"><span style="font-size:10pt">&quot;wgnuplot.exe gnuplot_command_file.xyz -&quot;</span></font></div>
<div align="left"><font face="Arial" size="2"><span style="font-size:10pt"><br />
</span></font></div>
<div align="left"><font face="Arial" size="2"><span style="font-size:10pt">Maxima calls wgnuplot with </span></font></div>
<div align="left"><font face="Arial" size="2"><span style="font-size:10pt">&quot;wgnuplot maxout.gnuplot -&quot;</span></font></div>
<div align="left"><font face="Arial" size="2"><span style="font-size:10pt"><br />
</span></font></div>
<div align="left"><font face="Arial" size="2"><span style="font-size:10pt">Important is the '-' at the end. Without you will see the plot window just for a millisecond. It 
keeps the gnuplot-process alive. The process is finished when you close the plot window.</span></font></div>
<div align="left"><font face="Arial" color="#7f0000" size="2"><span style="font-size:10pt"><br />
</span></font></div>
<div align="left"><font face="Arial" size="2"><span style="font-size:10pt">If you try to plot into a png file by using the 'set terminal png' preamble, in Windows you 
have no chance to finish the process, unless you prefer things like Ctrl+Alt+Del. </span></font></div>
<div align="left"><font face="Arial" size="2"><span style="font-size:10pt"><br />
</span></font></div>
<div align="left"><font face="Arial" size="2"><span style="font-size:10pt">2. In the case of [gnuplot_term,ps] the call to wgnuplot has no '-' at the end. So the following 
works:</span></font></div>
<div align="left"><font face="Arial" size="2"><span style="font-size:10pt"><br />
</span></font></div>
<div align="left"><font face="Arial" size="2"><span style="font-size:10pt">plot2d(x,[x,0,1],[gnuplot_term,ps],[gnuplot_preamble,&quot;set term png; set out 'D:/test.png'&quot;]);</span></font></div>
<div align="left"><font face="Arial" size="2"><span style="font-size:10pt"><br />
</span></font></div>
<div align="left"><font face="Arial" size="2"><span style="font-size:10pt">test.png is not locked, the gnuplot-process is finished. </span></font></div>
<div align="left"><font face="Arial" size="2"><span style="font-size:10pt">So the [gnuplot_term,ps] option can be used, if you wish to plot into a file via a 'set terminal 
png' preamble.</span></font></div>
<div align="left"><font face="Arial" size="2"><span style="font-size:10pt"><br />
</span></font></div>
<div align="left"><font face="Arial" size="2"><span style="font-size:10pt">Question: Would this be something to recommend? To set [gnuplot_term,ps] if you want a 
png output?</span></font></div>
<div align="left"><font face="Arial" size="2"><span style="font-size:10pt"><br />
</span></font></div>
<div align="left"><font face="Arial" size="2"><span style="font-size:10pt">Remark: In case of gnuplot_term 'ps' there is a second system call from Maxima:</span></font></div>
<div align="left"><font face="Arial" size="2"><span style="font-size:10pt">&quot;ghostview view-file&quot;</span></font></div>
<div align="left"><font face="Arial" size="2"><span style="font-size:10pt">This has no meaning in Windows, unless ghostview is installed and registered in the search 
path.</span></font></div>
<div align="left"><font face="Arial" size="2"><span style="font-size:10pt">In Linux this is different, I suppose. But we are talking about Windows, don't we?</span></font></div>
<div align="left"><font face="Arial" size="2"><span style="font-size:10pt"><br />
</span></font></div>
<div align="left"><font face="Arial" size="2"><span style="font-size:10pt">Volker</span></font></div>
<div align="left"><font face="Arial" size="2"><span style="font-size:10pt"><br />
</span></font></div>
<div align="left"><font face="Arial" size="2"><span style="font-size:10pt"><br />
</span></font></div>
<div align="left"><font face="Arial" color="#7f0000" size="2"><span style="font-size:10pt">&gt; I'm not familiar with plot.lisp and a question comes to my mind here:</span></font></div>
<div align="left"><font face="Arial" color="#7f0000" size="2"><span style="font-size:10pt">&gt; would such a thing work in linux?</span></font></div>
<div align="left"><font face="Arial" color="#7f0000" size="2"><span style="font-size:10pt">&gt; </span></font></div>
<div align="left"><font face="Arial" color="#7f0000" size="2"><span style="font-size:10pt">&gt; Best wishes</span></font></div>
<div align="left"><font face="Arial" color="#7f0000" size="2"><span style="font-size:10pt">&gt; </span></font></div>
<div align="left"><font face="Arial" color="#7f0000" size="2"><span style="font-size:10pt">&gt; -- </span></font></div>
<div align="left"><font face="Arial" color="#7f0000" size="2"><span style="font-size:10pt">&gt; Mario Rodriguez Riotorto</span></font></div>
<div align="left"><font face="Arial" color="#7f0000" size="2"><span style="font-size:10pt">&gt; www.biomates.net</span></font></div>
<div align="left"><font face="Arial" color="#7f0000" size="2"><span style="font-size:10pt">&gt; </span></font></div>
<div align="left"><font face="Arial" color="#7f0000" size="2"><span style="font-size:10pt">&gt; _______________________________________________</span></font></div>
<div align="left"><font face="Arial" color="#7f0000" size="2"><span style="font-size:10pt">&gt; Maxima mailing list</span></font></div>
<div align="left"><font face="Arial" color="#7f0000" size="2"><span style="font-size:10pt">&gt; Maxima at math.utexas.edu</span></font></div>
<div align="left"><font face="Arial" color="#7f0000" size="2"><span style="font-size:10pt">&gt; http://www.math.utexas.edu/mailman/listinfo/maxima</span></font></div>;
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