SciChart charts are very popular with scientists and engineers, but also find their application in sales dashboards. Drawing a scatter diagram is the first step in looking for correlation between variables. This example generates a Scatter Chart in code.

The XyScatterRenderableSeries can be used to render an XyDataSeries (which contains one X-point and one Y-point), XyyDataSeries (renders Y values), XyzDataSeries, HlDataSeries and OhlcDataSeries(renders Close values).

The Scatter Chart uses the PointMarker API to define the marker shape and size. This can be customized in code or you can create your own Point-Markers using our SpritePointMarker or DrawablePointMarker type.

Tip!

Perhaps you wanted a scatter point with a line? If so you can do this using the FastLineRenderableSeries and calling the setPointMarker() method.

// ScatterChartFragment.java

//******************************************************************************
// SCICHART® Copyright SciChart Ltd. 2011-2017. All rights reserved.
//
// Web: http://www.scichart.com
// Support: support@scichart.com
// Sales:   sales@scichart.com
//
// ScatterChartFragment.java is part of the SCICHART® Examples. Permission is hereby granted
// to modify, create derivative works, distribute and publish any part of this source
// code whether for commercial, private or personal use.
//
// The SCICHART® examples are distributed in the hope that they will be useful, but
// without any warranty. It is provided "AS IS" without warranty of any kind, either
// expressed or implied.
//******************************************************************************

package com.scichart.examples.fragments;

import android.support.annotation.ColorInt;
import android.view.animation.DecelerateInterpolator;

import com.scichart.charting.model.dataSeries.IXyDataSeries;
import com.scichart.charting.modifiers.AxisDragModifierBase.AxisDragMode;
import com.scichart.charting.visuals.SciChartSurface;
import com.scichart.charting.visuals.axes.IAxis;
import com.scichart.charting.visuals.pointmarkers.EllipsePointMarker;
import com.scichart.charting.visuals.pointmarkers.IPointMarker;
import com.scichart.charting.visuals.pointmarkers.TrianglePointMarker;
import com.scichart.charting.visuals.renderableSeries.XyScatterRenderableSeries;
import com.scichart.core.framework.UpdateSuspender;
import com.scichart.examples.R;
import com.scichart.examples.fragments.base.ExampleBaseFragment;

import java.util.Collections;
import java.util.Random;

import butterknife.BindView;

public class ScatterChartFragment extends ExampleBaseFragment {
    @BindView(R.id.chart)
    SciChartSurface surface;

    private final Random random = new Random();

    @Override
    protected int getLayoutId() {
        return R.layout.example_single_chart_fragment;
    }

    @Override
    protected void initExample() {
        final IAxis xAxis = sciChartBuilder.newNumericAxis().withGrowBy(0.1d, 0.1d).build();
        final IAxis yAxis = sciChartBuilder.newNumericAxis().withGrowBy(0.1d, 0.1d).build();

        final XyScatterRenderableSeries rSeries1 = getScatterRenderableSeries(new TrianglePointMarker(), 0xFFFFEB01, false);
        final XyScatterRenderableSeries rSeries2 = getScatterRenderableSeries(new EllipsePointMarker(), 0xFFffA300, false);
        final XyScatterRenderableSeries rSeries3 = getScatterRenderableSeries(new TrianglePointMarker(), 0xFFff6501, true);
        final XyScatterRenderableSeries rSeries4 = getScatterRenderableSeries(new EllipsePointMarker(), 0xFFffa300, true);

        UpdateSuspender.using(surface, new Runnable() {
            @Override
            public void run() {
                Collections.addAll(surface.getXAxes(), xAxis);
                Collections.addAll(surface.getYAxes(), yAxis);
                Collections.addAll(surface.getRenderableSeries(), rSeries1, rSeries2, rSeries3, rSeries4);
                Collections.addAll(surface.getChartModifiers(), sciChartBuilder.newModifierGroup()
                        .withZoomExtentsModifier().build()
                        .withPinchZoomModifier().build()
                        .withCursorModifier().withReceiveHandledEvents(true).build()
                        .withXAxisDragModifier().withReceiveHandledEvents(true).build()
                        .withYAxisDragModifier().withDragMode(AxisDragMode.Pan).build()
                        .build());

                sciChartBuilder.newAnimator(rSeries1).withWaveTransformation().withInterpolator(new DecelerateInterpolator()).withDuration(3000).withStartDelay(350).start();
                sciChartBuilder.newAnimator(rSeries2).withWaveTransformation().withInterpolator(new DecelerateInterpolator()).withDuration(3000).withStartDelay(350).start();
                sciChartBuilder.newAnimator(rSeries3).withWaveTransformation().withInterpolator(new DecelerateInterpolator()).withDuration(3000).withStartDelay(350).start();
                sciChartBuilder.newAnimator(rSeries4).withWaveTransformation().withInterpolator(new DecelerateInterpolator()).withDuration(3000).withStartDelay(350).start();
            }
        });
    }

    private XyScatterRenderableSeries getScatterRenderableSeries(IPointMarker pointMarker, @ColorInt int color, boolean negative) {
        final String seriesName = pointMarker instanceof EllipsePointMarker ?
                negative ? "Negative Ellipse" : "Positive Ellipse" :
                negative ? "Negative" : "Positive";

        final IXyDataSeries<Integer, Double> dataSeries = sciChartBuilder.newXyDataSeries(Integer.class, Double.class).withSeriesName(seriesName).build();

        for (int i = 0; i < 200; i++) {
            final double time = (i < 100) ? getRandom(random, 0, i + 10) / 100 : getRandom(random, 0, 200 - i + 10) / 100;
            final double y = negative ? -time * time * time : time * time * time;

            dataSeries.append(i, y);
        }

        return sciChartBuilder.newScatterSeries()
                .withDataSeries(dataSeries)
                .withStrokeStyle(color)
                .withPointMarker(sciChartBuilder.newPointMarker(pointMarker)
                        .withSize(6, 6)
                        .withStroke(0xFFFFFFFF, 0.1f)
                        .withFill(color)
                        .build())
                .build();
    }

    private double getRandom(Random random, double min, double max) {
        return min + (max - min) * random.nextDouble();
    }
}

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