XY Scatter AndroidPlot - scatter-plot

Question

Attempting to use AndroidPlot to create an XY scatter plot, encountering a problem... whereby the plot only draws points from left to right, a scrolling chart essentially.
Example... say I have the following co-ordinates, (0,1), (1,0), (0,-1), (-1,0) I would expect to see a diamond shape (if all the points were joined by a line)
I've used the AndroidPlot library successfully before so am somewhat familiar with the methods available.
Is there any examples for a scatter plot using the AndroidPlot library?
Hope I'm making sense here..
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Collection;
import pl.flex_it.androidplot.XYSeries;
import com.androidplot.series.XYSeries;
import com.androidplot.xy.BoundaryMode;
import com.androidplot.xy.LineAndPointFormatter;
import com.androidplot.xy.SimpleXYSeries;
import com.androidplot.xy.XYPlot;
import android.app.Fragment;
import android.graphics.Color;
import android.os.Bundle;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
public class Temp extends Fragment {
private static XYPlot xyPlot;
private XYSeriesShimmer series;
private LineAndPointFormatter series1Format;
private ArrayList<Number> ALdata1, ALdata2;
private int Adata1[], Adata2[];
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
View rootView = inflater.inflate(R.layout.fragment_test, container, false);
// Import plot from the layout
xyPlot = (XYPlot) rootView.findViewById(R.id.xyPlot);
xyPlot.setDomainBoundaries(-2, 2, BoundaryMode.FIXED); // freeze the domain boundary:
xyPlot.setRangeBoundaries(-2, 2, BoundaryMode.FIXED);
ALdata1 = new ArrayList<Number>();
ALdata2 = new ArrayList<Number>();
ALdata1.clear();
ALdata2.clear();
Adata1 = new int[]{0,1,0,-1};
Adata2 = new int[]{1,0,-1,0};
series = new XYSeriesShimmer(ALdata1, ALdata2, 0, "Sightings in USA");
series1Format = new LineAndPointFormatter(Color.TRANSPARENT, Color.BLACK, null); // line color, point color, fill color
xyPlot.addSeries(series, series1Format);
plotDataMethod();
return rootView;
}
private void plotDataMethod() {
for(int i=0; i<Adata1.length; i++){
ALdata1.add(Adata1[i]);
ALdata2.add(Adata2[i]);
try {
Thread.sleep(1000);
} catch (InterruptedException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
series.updateData(ALdata1, ALdata2);
xyPlot.redraw();
}
}
}
EDIT:
package pl.flex_it.androidplot;
import java.util.ArrayList;
import java.util.Collections;
import java.util.List;
import com.androidplot.series.XYSeries;
public class XYSeriesShimmer implements XYSeries {
private List<Number> dataX;
private List<Number> dataY;
private int seriesIndex;
private String title;
public XYSeriesShimmer(List<Number> datasource, int seriesIndex, String title) {
this.dataY = datasource;
this.seriesIndex = seriesIndex;
this.title = title;
}
public XYSeriesShimmer(List<Number> datasourceX, List<Number> datasourceY, int seriesIndex, String title) {
this.dataX = datasourceX;
this.dataY = datasourceY;
this.seriesIndex = seriesIndex;
this.title = title;
}
#Override
public String getTitle() {
return title;
}
#Override
public int size() {
return dataY.size();
}
#Override
public Number getY(int index) {
return dataY.get(index);
}
#Override
public Number getX(int index) {
return index;
}
public void updateData(List<Number> datasourceX){ //dont need to use this cause, the reference is only stored, modifying the datasource externally will cause this to be updated as well
this.dataY=datasourceX;
}
public void updateData(List<Number> datasourceX, List<Number> datasourceY){ //dont need to use this cause, the reference is only stored, modifying the datasource externally will cause this to be updated as well
this.dataX=datasourceX;
this.dataY=datasourceY;
}
}

Answer 1

This looks like it could be the problem - in XYSeriesShimmer:
#Override
public Number getX(int index) {
return index;
}
This is always going to return i, which means each element's x value is 1 larger than the previous...exactly what you are experiencing. Try changing it to this:
#Override
public Number getX(int index) {
return dataX.get(i);
}