散点图不会改变颜色

时间:2012-07-09 14:03:10

标签: java eclipse gnuplot javaplot

我正在尝试更改3D散点图上的点的颜色。点变为黑色,而不是我想要的颜色,键上的点变为正确的颜色。有谁知道为什么会这样?

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();

}
}

在绘制函数时,这有多么奇怪。

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正在发送命令:

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

2 个答案:

答案 0 :(得分:0)

好吧,我认为您需要的是在散点图中使用setPointType而不是setLineType,因为没有Lines。它只有积分。

答案 1 :(得分:0)

正如mgilson在评论中所说:

 use myStyle.setLineType(3);

(@ mgilson,如果你想得到答案的答案,那就自​​己写吧,给我留言,我会接受它而不是_