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POSpectogram using JavaPlot not working
 

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  1. POSpectogram using JavaPlot not working
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    <p>I'm trying to display a spectogram using JavaPlot with this piece of code:</p> <pre><code> PlotStyle style = new PlotStyle(); style.setStyle(Style.IMAGE); DataSetPlot data = new DataSetPlot(points); data.setPlotStyle(style); JavaPlot plot = new JavaPlot(); plot.addPlot(data); plot.plot(); </code></pre> <p>Where the points are valid as they work when using gnuplot in the command line like this:</p> <pre><code> gnuplot --persist -e 'plot "data.dat" w image' </code></pre> <p>The problem is that the above piece of code doesn't show any image at all, it is all white. However the previous command works fine, and data.dat contains the points in the exactly same format. No error appears when running the code.</p> <p>Here is a example of some points data:</p> <pre><code>0.0 193.0 0.18183826861232413 0.0 194.0 0.2467637036800797 0.0 195.0 0.43531750893288235 0.0 196.0 0.3893599780473012 0.0 197.0 0.3220816458659573 0.0 198.0 0.25389713892289173 0.0 199.0 0.22935136709597423 1.0 0.0 0.23021155472288352 1.0 1.0 0.33383157107150707 1.0 2.0 0.3745792715533692 1.0 3.0 2.028348052193793 1.0 4.0 2.4150235476868978 1.0 5.0 2.4169194327766736 1.0 6.0 1.8633442057577019 1.0 7.0 4.2682342944471054 1.0 8.0 3.22544345282322 </code></pre> <p>And this are the commands sended to gnuplot by JavaPlot:</p> <pre><code>set multiplot layout 1,2 rowsfirst downwards _gnuplot_error = 1 plot '-' title 'Datafile 1' with image ; _gnuplot_error = 0 0.0 9.0 6.612583996900796 1.0 9.0 4.719585678813712 2.0 9.0 0.5475948495661151 3.0 9.0 0.7385211622757041 4.0 9.0 0.711512824841686 5.0 9.0 3.7572382303712604 6.0 9.0 1.0818137070547578 7.0 9.0 0.057188125070687344 8.0 9.0 0.8218555010675036 9.0 9.0 5.754170136586405 e if (_gnuplot_error == 1) print '_ERROR_' unset multiplot quit </code></pre> <p>For this example I took 10x10 points, so the passed coordinates should be something like:</p> <pre><code>0.0 0.0 6.612583996900796 0.0 1.0 4.719585678813712 0.0 2.0 0.5475948495661151 0.0 3.0 0.7385211622757041 0.0 4.0 0.711512824841686 0.0 5.0 3.7572382303712604 0.0 6.0 1.0818137070547578 0.0 7.0 0.057188125070687344 0.0 8.0 0.8218555010675036 0.0 9.0 5.754170136586405 1.0 0.0 6.612583996900796 1.0 1.0 4.719585678813712 1.0 2.0 0.5475948495661151 1.0 3.0 0.7385211622757041 1.0 4.0 0.711512824841686 1.0 5.0 3.7572382303712604 1.0 6.0 1.0818137070547578 1.0 7.0 0.057188125070687344 1.0 8.0 0.8218555010675036 1.0 9.0 5.754170136586405 ... 9.0 9.0 xxxxxxxxxxxxx </code></pre> <p>It seems that JavaPlot is not iterating the Y coordinates.</p> <p>Does someone know what am I doing wrong?</p>
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    1. USaitorkun
    1. USaitorkun
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    1. This table or related slice is empty.
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    1. COIs there a way to check the JavaPlot pipe to see what commands gnuplot is actually seeing?
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      1. POSpectogram using JavaPlot not working
      1. USmgilson
    2. COHow can I do that?
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      1. POSpectogram using JavaPlot not working
      1. USaitorkun
    3. CONot sure (I don't know java), however, it is definitely possible as it was done by another user: http://stackoverflow.com/q/11396616/748858 -- Perhaps rather than sending it to `gnuplot.exe`, send it to another program which reads from stdin and writes a temporary file...
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      1. POSpectogram using JavaPlot not working
      1. USmgilson
 

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