Scatter Plot will not change color

Question

I'm trying to change the color of the points on my 3D Scatter Plot. The points change to black, not the color I want and the point on the key changes to the correct color. Does anyone know why this occurs?

import com.panayotis.gnuplot.JavaPlot;
import com.panayotis.gnuplot.plot.*;
import com.panayotis.gnuplot.style.NamedPlotColor;
import com.panayotis.gnuplot.style.PlotStyle;
import com.panayotis.gnuplot.style.Style;


public class ScatterPlot4D {

public static void main(String[] args) {

    int rows = 100;
    int D = 4;

    double [][] dataSet = new double [rows][D];
    for(int x = 0;x < rows; x++){
        for(int y = 0;y < D; y++){
            dataSet[x][y]=Math.random();
        }
    }

    JavaPlot p = new JavaPlot("C:\\Program Files\\gnuplot\\bin\\pgnuplot.exe");       
    p.newGraph3D();

    PlotStyle myStyle = new PlotStyle();
    myStyle.setStyle(Style.POINTS);
    myStyle.setLineType(NamedPlotColor.BLUE); 

    DataSetPlot myPlot = new DataSetPlot(dataSet);  
    myPlot.setPlotStyle(myStyle);

    p.addPlot(myPlot);

    p.splot();

}
}

What's weird is this works when graphing a function.

import com.panayotis.gnuplot.GNUPlot;
import com.panayotis.gnuplot.plot.*;
import com.panayotis.gnuplot.style.NamedPlotColor;
import com.panayotis.gnuplot.style.PlotStyle;
import com.panayotis.gnuplot.style.Style;

public class test3D {

public static void main(String[] args) {

    GNUPlot p = new GNUPlot("C:\\Program Files\\gnuplot\\bin\\pgnuplot.exe");

    p.newGraph3D();

    PlotStyle myStyle = new PlotStyle();
    myStyle.setStyle(Style.IMPULSES);
    myStyle.setLineType(NamedPlotColor.BLUE); 

    FunctionPlot myPlot = new FunctionPlot("tan(x)");
    myPlot.setTitle("3D Plot");
    myPlot.setPlotStyle(myStyle);

    p.addPlot(myPlot);

    p.splot();

}

}

gnuplot is being sent the commands:

gnuplot> set multiplot layout 1,2 rowsfirst downwards
multiplot> _gnuplot_error = 1
multiplot> splot '-' title 'Datafile 1' with points linetype rgb 'blue' ;_gnuplot_error = 0X
input data ('e' ends) > random data is here, not included for brevity
multiplot> if (_gnuplot_error == 1) print '_ERROR_'
 multiplot> unset multiplot

Is there any way to dump the GNUPlot stuff to a file so we can see what gnuplot is working with? — mgilson, Jul 10 '12 at 02:39
Does the PlotStyle class provide a "setLineColor" method? Essentially, the problem is that your generating `... with points linetype rgb 'blue'` instead of `... with points linecolor rgb 'blue'` — mgilson, Jul 10 '12 at 14:04
You could also try `myStyle.setLineType(3);` as linetype 3 in gnuplot defaults to blue. Also, it is worth mentioning that I think you've probably found a bug in javaplot from what I understand in reading the documentation. (Of course, I don't code in java, so I could be wrong). — mgilson, Jul 10 '12 at 14:09
@mgilson, whoo! that worked! stick your second comment as an answer and I'll mark it. Anyway, I tried changing the source so it would command 'linecolor'; still didn't work. I don't think JavaPlot ever was finished. I had to add the splot command myself — Daniel, Jul 10 '12 at 15:09

score 0 · Answer 1 · answered Jul 10 '12 at 01:38

0

well, I think that what you need is to use setPointType instead of setLineType in the scatter graph, as is has no Lines. it has only Points.

answered Jul 10 '12 at 01:38

Miguel

566
1
5
16

setPointType takes an int as an argument. Trying various options I've only been able to change the shape of the point, not the color. http://sparky.rice.edu/gnuplot.html makes me think I can change colors with an int but I can't seem to get it to work. – Daniel Jul 10 '12 at 13:48

score 0 · Accepted Answer · answered Jun 24 '13 at 18:35

0

As mgilson said in the comments:

 use myStyle.setLineType(3);

(@mgilson, if you want credit for the answer, just write it yourself, message me and I'll accept it instead_

answered Jun 24 '13 at 18:35

Daniel

2,435
5
26
40

Scatter Plot will not change color

2 Answers2

Linked