This example demonstrates how to create an iOS line chart with a secondary Y-Axis. SciChart iOS supports unlimited, multiple top or bottom X-Axes and unlimited, multiple left and right Y-Axes. This example shows in a simple way how to register a line series on each axis.

To add multiple YAxis to an iOS Chart, add SCIAxisBase devived types to the SCIChartSurface.yAxes property.

You can set the alignment of any YAxis to Left, Right, Top, Bottom using the SCIAxisAlignment enumeration.

Finally, RenderableSeries can be registered on an axis using the RenderablerSeries.xAxisId, RenderableSeries.yAxisId properties.

// SecondaryYAxesChartView.m

//******************************************************************************
// SCICHART® Copyright SciChart Ltd. 2011-2018. All rights reserved.
//
// Web: http://www.scichart.com
// Support: support@scichart.com
// Sales:   sales@scichart.com
//
// SecondaryYAxesChartView.m 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.
//******************************************************************************

#import "SecondaryYAxesChartView.h"
#import "DataManager.h"

@implementation SecondaryYAxesChartView

- (void)initExample {
    id<SCIAxis2DProtocol> xAxis = [SCINumericAxis new];
    xAxis.growBy = [[SCIDoubleRange alloc] initWithMin:SCIGeneric(0.1) Max:SCIGeneric(0.1)];
    xAxis.axisTitle = @"Bottom Axis";
    
    id<SCIAxis2DProtocol> rightYAxis = [SCINumericAxis new];
    rightYAxis.growBy = [[SCIDoubleRange alloc] initWithMin:SCIGeneric(0.1) Max:SCIGeneric(0.1)];
    rightYAxis.axisId = @"rightAxisId";
    rightYAxis.axisTitle = @"Right Axis";
    rightYAxis.axisAlignment = SCIAxisAlignment_Right;
    rightYAxis.style.labelStyle.colorCode = 0xFF279B27;
    
    id<SCIAxis2DProtocol> leftYAxis = [SCINumericAxis new];
    leftYAxis.growBy = [[SCIDoubleRange alloc] initWithMin:SCIGeneric(0.1) Max:SCIGeneric(0.1)];
    leftYAxis.axisId = @"leftAxisId";
    leftYAxis.axisTitle = @"Left Axis";
    leftYAxis.axisAlignment = SCIAxisAlignment_Left;
    leftYAxis.style.labelStyle.colorCode = 0xFF4083B7;

    SCIXyDataSeries * ds1 = [[SCIXyDataSeries alloc] initWithXType:SCIDataType_Double YType:SCIDataType_Double];
    SCIXyDataSeries * ds2 = [[SCIXyDataSeries alloc] initWithXType:SCIDataType_Double YType:SCIDataType_Double];

    DoubleSeries * ds1Points = [DataManager getFourierSeriesWithAmplitude:1.0 phaseShift:0.1 count:5000];
    DoubleSeries * ds2Points = [DataManager getDampedSinewaveWithAmplitude:3.0 DampingFactor:0.005 PointCount:5000 Freq:10];
    
    [ds1 appendRangeX:ds1Points.xValues Y:ds1Points.yValues Count:ds1Points.size];
    [ds2 appendRangeX:ds2Points.xValues Y:ds2Points.yValues Count:ds2Points.size];
    
    SCIFastLineRenderableSeries * rs1 = [SCIFastLineRenderableSeries new];
    rs1.dataSeries = ds1;
    rs1.strokeStyle = [[SCISolidPenStyle alloc] initWithColorCode:0xFF4083B7 withThickness:1.0];
    rs1.yAxisId = @"leftAxisId";
    
    SCIFastLineRenderableSeries * rs2 = [SCIFastLineRenderableSeries new];
    rs2.dataSeries = ds2;
    rs2.strokeStyle = [[SCISolidPenStyle alloc] initWithColorCode:0xFF279B27 withThickness:2.0];
    rs2.yAxisId = @"rightAxisId";
    
    [SCIUpdateSuspender usingWithSuspendable:self.surface withBlock:^{
        [self.surface.xAxes add:xAxis];
        [self.surface.yAxes add:leftYAxis];
        [self.surface.yAxes add:rightYAxis];
        [self.surface.renderableSeries add:rs1];
        [self.surface.renderableSeries add:rs2];
        
        [rs1 addAnimation:[[SCISweepRenderableSeriesAnimation alloc] initWithDuration:3 curveAnimation:SCIAnimationCurve_EaseOut]];
        [rs2 addAnimation:[[SCISweepRenderableSeriesAnimation alloc] initWithDuration:3 curveAnimation:SCIAnimationCurve_EaseOut]];
    }];
}

@end

// SecondaryYAxesChartView.swift

//******************************************************************************
// SCICHART® Copyright SciChart Ltd. 2011-2018. All rights reserved.
//
// Web: http://www.scichart.com
// Support: support@scichart.com
// Sales:   sales@scichart.com
//
// SecondaryYAxesChartView.swift 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.
//******************************************************************************

class SecondaryYAxesChartView: SingleChartLayout {
    
    override func initExample() {
        let xAxis = SCINumericAxis()
        xAxis.growBy = SCIDoubleRange(min: SCIGeneric(0.1), max: SCIGeneric(0.1))
        xAxis.axisTitle = "Bottom Axis"
        
        let rightYAxis = SCINumericAxis()
        rightYAxis.growBy = SCIDoubleRange(min: SCIGeneric(0.1), max: SCIGeneric(0.1))
        rightYAxis.axisId = "rightAxisId"
        rightYAxis.axisTitle = "Right Axis"
        rightYAxis.axisAlignment = .right
        rightYAxis.style.labelStyle.colorCode = 0xFF279B27
        
        let leftYAxis = SCINumericAxis()
        leftYAxis.growBy = SCIDoubleRange(min: SCIGeneric(0.1), max: SCIGeneric(0.1))
        leftYAxis.axisId = "leftAxisId"
        leftYAxis.axisTitle = "Left Axis"
        leftYAxis.axisAlignment = .left
        leftYAxis.style.labelStyle.colorCode = 0xFF4083B7
        
        let ds1 = SCIXyDataSeries(xType: .double, yType: .double)
        let ds2 = SCIXyDataSeries(xType: .double, yType: .double)
        
        let ds1Points = DataManager.getFourierSeries(withAmplitude: 1.0, phaseShift: 0.1, count: 5000)
        let ds2Points = DataManager.getDampedSinewave(withAmplitude: 3.0, dampingFactor: 0.005, pointCount: 5000, freq: 10)
        
        ds1.appendRangeX(ds1Points!.xValues, y: ds1Points!.yValues, count: ds1Points!.size)
        ds2.appendRangeX(ds2Points!.xValues, y: ds2Points!.yValues, count: ds2Points!.size)
        
        let rs1 = SCIFastLineRenderableSeries()
        rs1.dataSeries = ds1
        rs1.strokeStyle = SCISolidPenStyle(colorCode: 0xFF4083B7, withThickness: 2.0)
        rs1.yAxisId = "leftAxisId"
        
        let rs2 = SCIFastLineRenderableSeries()
        rs2.dataSeries = ds2
        rs2.strokeStyle = SCISolidPenStyle(colorCode: 0xFF279B27, withThickness: 2.0)
        rs2.yAxisId = "rightAxisId"
        
        SCIUpdateSuspender.usingWithSuspendable(surface) {
            self.surface.xAxes.add(xAxis)
            self.surface.yAxes.add(leftYAxis)
            self.surface.yAxes.add(rightYAxis)
            self.surface.renderableSeries.add(rs1)
            self.surface.renderableSeries.add(rs2)
            
            rs1.addAnimation(SCISweepRenderableSeriesAnimation(duration: 3, curveAnimation: .easeOut))
            rs2.addAnimation(SCISweepRenderableSeriesAnimation(duration: 3, curveAnimation: .easeOut))
        }
    }
}

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