问题
I am trying to plot a series of functions that are similar. The domain is [0,1] and the range always in say [-3,3].
I want the limits on the Y axis to be the same for each graph. Trying to set the series y min and y max does not seem to work.
Is there a way to make the limits on the Y axis be the same on each graph?
import java.math.BigDecimal;
import java.util.*;
import com.xeiam.xchart.*;
public class Bug {
static void plot(Chart chart,int n) {
chart.setTitle("title");
chart.setXAxisTitle("X");
chart.setYAxisTitle("Y");
List<Number> x=new ArrayList<Number>();
List<Number> y=new ArrayList<Number>();
String seriesName=addOneSeries(chart,n,x,y);
}
private static String addOneSeries(Chart chart,int n,List<Number> x,List<Number> y) {
for(int i=0;i<=10;i++) {
x.add(i/10.);
y.add(i*n/10.);
}
String seriesName="series "+n;
Series series=chart.addSeries(seriesName,x,y);
series.xMin=BigDecimal.ZERO;
series.xMax=BigDecimal.ONE;
series.yMin=new BigDecimal(-5);
series.yMax=new BigDecimal(5);
return seriesName;
}
public static void main(String[] args) {
for(int i=0;i<4;i++) {
Chart chart=new Chart(700,500);
plot(chart,i);
new SwingWrapper(chart).displayChart();
}
}
}
回答1:
Setting the min and max values on a Chart
is now possible with XChart. Below is a rework of OP's Bug class that demonstrates this. At this moment, since it's a brand new feature, you'll have to get an xchart-2.0.0-SNAPSHOT jar here in order to see this capability. Please feel free to ask for help or request more features!
public class NoBug {
static void plot(Chart chart, int n) {
chart.setChartTitle("title");
chart.setXAxisTitle("X");
chart.setYAxisTitle("Y");
List<Number> x = new ArrayList<Number>();
List<Number> y = new ArrayList<Number>();
String seriesName = addOneSeries(chart, n, x, y);
}
private static String addOneSeries(Chart chart, int n, List<Number> x, List<Number> y) {
for (int i = 0; i <= 10; i++) {
x.add(i / 10.);
y.add(i * n / 10.);
}
String seriesName = "series " + n;
Series series = chart.addSeries(seriesName, x, y);
chart.getStyleManager().setxAxisMin(0);
chart.getStyleManager().setxAxisMax(1);
chart.getStyleManager().setyAxisMin(-5);
chart.getStyleManager().setyAxisMax(5);
return seriesName;
}
public static void main(String[] args) {
for (int i = 0; i < 4; i++) {
Chart chart = new LineChart(700, 500);
plot(chart, i);
new SwingWrapper(chart).displayChart();
}
}
}
来源:https://stackoverflow.com/questions/14767577/how-to-make-limits-on-the-y-axis-be-the-same-using-xchart