This example demonstrates how to create a Xamarin Stacked Mountain Chart in code. A Stacked Mountain chart allows multiple mountain or area charts to be stacked one above each other, summing the values, or stacked up to 100%.

You may style chart by styling Mountains’ outline and fill. The Mountain-Series supports semi-transparent and gradient fills and looks great!

See Native iOS/Android Documentation on how to use this type here:

• The iOS Stacked Mountain Chart.
• The Android Stacked Mountain Chart

// StackedMountainChartViewController.cs (Xamarin.iOS)

using CoreGraphics;
using SciChart.iOS.Charting;

namespace Xamarin.Examples.Demo.iOS
{
    [ExampleDefinition("Stacked Mountain Chart", description: "Demonstrates a Stacked Mountain Chart", icon: ExampleIcon.StackedMountainChart)]
    public class StackedMountainChartViewController : SingleChartViewController<SCIChartSurface>
    {
        protected override void InitExample()
        {
            var yValues1 = new[] { 4.0, 7, 5.2, 9.4, 3.8, 5.1, 7.5, 12.4, 14.6, 8.1, 11.7, 14.4, 16.0, 3.7, 5.1, 6.4, 3.5, 2.5, 12.4, 16.4, 7.1, 8.0, 9.0 };
            var yValues2 = new[] { 15.0, 10.1, 10.2, 10.4, 10.8, 1.1, 11.5, 3.4, 4.6, 0.1, 1.7, 14.4, 6.0, 13.7, 10.1, 8.4, 8.5, 12.5, 1.4, 0.4, 10.1, 5.0, 1.0 };

            var ds1 = new XyDataSeries<double, double> { SeriesName = "data 1" };
            var ds2 = new XyDataSeries<double, double> { SeriesName = "data 2" };

            for (var i = 0; i < yValues1.Length; i++) ds1.Append(i, yValues1[i]);
            for (var i = 0; i < yValues2.Length; i++) ds2.Append(i, yValues2[i]);

            var rSeries1 = GetRenderableSeries(ds1, 0xDDDBE0E1, 0x88B6C1C3);
            var rSeries2 = GetRenderableSeries(ds2, 0xDDACBCCA, 0x88439AAF);

            var seriesCollection = new SCIVerticallyStackedMountainsCollection();
            seriesCollection.Add(rSeries1);
            seriesCollection.Add(rSeries2);

            using (Surface.SuspendUpdates())
            {
                Surface.XAxes.Add(new SCINumericAxis());
                Surface.YAxes.Add(new SCINumericAxis());
                Surface.RenderableSeries.Add(seriesCollection);
                Surface.ChartModifiers.Add(new SCITooltipModifier());

                SCIAnimations.WaveSeries(rSeries1, 3, new SCICubicEase());
                SCIAnimations.WaveSeries(rSeries2, 3, new SCICubicEase());
            }
        }

        private SCIStackedMountainRenderableSeries GetRenderableSeries(IDataSeries dataSeries, uint fillColorStart, uint fillColorEbd)
        {
            return new SCIStackedMountainRenderableSeries
            {
                DataSeries = dataSeries,
                StrokeStyle = new SCISolidPenStyle(0xFFFFFFFF, 1),
                AreaStyle = new SCILinearGradientBrushStyle(new CGPoint(0, 0), new CGPoint(1, 1), fillColorStart, fillColorEbd),
            };
        }
    }
}

// StackedMountainChartFragment.cs (Xamarin.Android)

using Android.Views.Animations;
using SciChart.Charting.Model;
using SciChart.Charting.Model.DataSeries;
using SciChart.Charting.Modifiers;
using SciChart.Charting.Visuals;
using SciChart.Charting.Visuals.Animations;
using SciChart.Charting.Visuals.Axes;
using SciChart.Charting.Visuals.RenderableSeries;
using SciChart.Drawing.Common;
using Xamarin.Examples.Demo;
using Xamarin.Examples.Demo.Droid.Fragments.Base;

namespace Xamarin.Examples.Demo.Droid.Fragments.Examples
{
    [ExampleDefinition("Stacked Mountain Chart", description: "Demonstrates a Stacked Mountain Chart", icon: ExampleIcon.StackedMountainChart)]
    public class StackedMountainChartFragment : ExampleBaseFragment
    {
        public SciChartSurface Surface => View.FindViewById<SciChartSurface>(Resource.Id.chart);

        public override int ExampleLayoutId => Resource.Layout.Example_Single_Chart_Fragment;

        protected override void InitExample()
        {
            var xAxis = new NumericAxis(Activity);
            var yAxis = new NumericAxis(Activity);

            var yValues1 = new[] {4.0, 7, 5.2, 9.4, 3.8, 5.1, 7.5, 12.4, 14.6, 8.1, 11.7, 14.4, 16.0, 3.7, 5.1, 6.4, 3.5, 2.5, 12.4, 16.4, 7.1, 8.0, 9.0};
            var yValues2 = new[] {15.0, 10.1, 10.2, 10.4, 10.8, 1.1, 11.5, 3.4, 4.6, 0.1, 1.7, 14.4, 6.0, 13.7, 10.1, 8.4, 8.5, 12.5, 1.4, 0.4, 10.1, 5.0, 1.0};

            var ds1 = new XyDataSeries<double, double> {SeriesName = "data 1"};
            var ds2 = new XyDataSeries<double, double> {SeriesName = "data 2"};

            for (var i = 0; i < yValues1.Length; i++) ds1.Append(i, yValues1[i]);
            for (var i = 0; i < yValues2.Length; i++) ds2.Append(i, yValues2[i]);

            var series1 = GetRenderableSeries(ds1, 0xDDDBE0E1, 0x88B6C1C3);
            var series2 = GetRenderableSeries(ds2, 0xDDACBCCA, 0x88439AAF);

            var seriesCollection = new VerticallyStackedMountainsCollection();
            seriesCollection.Add(series1);
            seriesCollection.Add(series2);

            using (Surface.SuspendUpdates())
            {
                Surface.XAxes.Add(xAxis);
                Surface.YAxes.Add(yAxis);
                Surface.RenderableSeries.Add(seriesCollection);
                Surface.ChartModifiers = new ChartModifierCollection
                {
                    new CursorModifier(),
                    new ZoomExtentsModifier(),
                };

                new WaveAnimatorBuilder(series1) { Interpolator = new DecelerateInterpolator(), Duration = 3000, StartDelay = 350 }.Start();
                new WaveAnimatorBuilder(series2) { Interpolator = new DecelerateInterpolator(), Duration = 3000, StartDelay = 350 }.Start();
            }
        }

        private StackedMountainRenderableSeries GetRenderableSeries(IDataSeries dataSeries, uint fillColorStart, uint fillColorEbd)
        {
            return new StackedMountainRenderableSeries
            {
                DataSeries = dataSeries,
                AreaStyle = new LinearGradientBrushStyle(0, 0, 0, 1, fillColorStart, fillColorEbd)
            };
        }
    }
}

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