Changing the scale of the axis is useful when, for example, the chart values are large numbers that you want to appear shorter and more readable. This example showcases how to make the chart panning while dragging the axes with the finger for both Y and X axes. You can make Axis to Scale on SciChart iOS Charts by adding add Axis-Drag scaling to a SciChartSurface using theSCIXAxisDragModifier and SCIYAxisDragModifier. ChartModifiers can be added to the SCIChartSurface by adding them to the sciChartSurface.chartModifiers collection.
Finally, drag modifiers can be used in Absolute mode (when YAxis.getAutoRange()=false) as well as Relative mode (when YAxis.getAutoRange()=true).

TIP!
You can control how the series behaves as you pan to the edge of the data with the SCIXAxisDragModifier setClipModeX() method.

// DragAxisToScaleChartView.m

//******************************************************************************
// SCICHART® Copyright SciChart Ltd. 2011-2018. All rights reserved.
//
// Web: http://www.scichart.com
// Support: support@scichart.com
// Sales:   sales@scichart.com
//
// DragAxisToScaleChartView.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 "DragAxisToScaleChartView.h"
#import "DataManager.h"
#import "RandomWalkGenerator.h"

@implementation DragAxisToScaleChartView

- (void)initExample {
    id<SCIAxis2DProtocol> xAxis = [SCINumericAxis new];
    xAxis.growBy = [[SCIDoubleRange alloc] initWithMin:SCIGeneric(0.1) Max:SCIGeneric(0.1)];
    xAxis.visibleRange = [[SCIDoubleRange alloc] initWithMin:SCIGeneric(3) Max:SCIGeneric(6)];
    
    id<SCIAxis2DProtocol> rightYAxis = [SCINumericAxis new];
    rightYAxis.growBy = [[SCIDoubleRange alloc] initWithMin:SCIGeneric(0.1) Max:SCIGeneric(0.1)];
    rightYAxis.axisId = @"RightAxisId";
    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.axisAlignment = SCIAxisAlignment_Left;
    leftYAxis.style.labelStyle.colorCode = 0xFF4083B7;
    
    DoubleSeries * fourierSeries = [DataManager getFourierSeriesWithAmplitude:1.0 phaseShift:0.1 count:5000];
    DoubleSeries * dampedSinewave = [DataManager getDampedSinewaveWithPad:1500 Amplitude:3.0 Phase:0.0 DampingFactor:0.005 PointCount:5000 Freq:10];
    
    SCIXyDataSeries * mountainDataSeries = [[SCIXyDataSeries alloc] initWithXType:SCIDataType_Double YType:SCIDataType_Double];
    SCIXyDataSeries * lineDataSeries = [[SCIXyDataSeries alloc] initWithXType:SCIDataType_Double YType:SCIDataType_Double];
    
    [mountainDataSeries appendRangeX:fourierSeries.xValues Y:fourierSeries.yValues Count:fourierSeries.size];
    [lineDataSeries appendRangeX:dampedSinewave.xValues Y:dampedSinewave.yValues Count:dampedSinewave.size];
    
    SCIFastMountainRenderableSeries * mountainSeries = [SCIFastMountainRenderableSeries new];
    mountainSeries.dataSeries = mountainDataSeries;
    mountainSeries.areaStyle = [[SCISolidBrushStyle alloc]initWithColorCode:0x771964FF];
    mountainSeries.style.strokeStyle = [[SCISolidPenStyle alloc] initWithColorCode:0xFF0944CF withThickness:2.0];
    mountainSeries.yAxisId = @"LeftAxisId";
    
    SCIFastLineRenderableSeries * lineSeries = [SCIFastLineRenderableSeries new];
    lineSeries.dataSeries = lineDataSeries;
    lineSeries.strokeStyle = [[SCISolidPenStyle alloc] initWithColorCode:0xFF279B27 withThickness:2.0];
    lineSeries.yAxisId = @"RightAxisId";
    
    SCIYAxisDragModifier * leftYAxisDM = [SCIYAxisDragModifier new];
    leftYAxisDM.axisId = @"LeftAxisId";
    
    SCIYAxisDragModifier * rightYAxisDM = [SCIYAxisDragModifier new];
    rightYAxisDM.axisId = @"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:mountainSeries];
        [self.surface.renderableSeries add:lineSeries];
        self.surface.chartModifiers = [[SCIChartModifierCollection alloc] initWithChildModifiers:@[[SCIXAxisDragModifier new], leftYAxisDM, rightYAxisDM, [SCIZoomExtentsModifier new]]];
        
        [mountainSeries addAnimation:[[SCIWaveRenderableSeriesAnimation alloc] initWithDuration:3.0 curveAnimation:SCIAnimationCurve_EaseInOut]];
        [lineSeries addAnimation:[[SCISweepRenderableSeriesAnimation alloc] initWithDuration:3.0 curveAnimation:SCIAnimationCurve_EaseInOut]];
    }];
}

@end

// DragAxisToScaleChartView.swift

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

    override func initExample() {
        let xAxis = SCINumericAxis()
        xAxis.growBy = SCIDoubleRange(min: SCIGeneric(0.1), max: SCIGeneric(0.1))
        xAxis.visibleRange = SCIDoubleRange(min: SCIGeneric(3), max: SCIGeneric(6))
        
        let rightYAxis = SCINumericAxis()
        rightYAxis.growBy = SCIDoubleRange(min: SCIGeneric(0.1), max: SCIGeneric(0.1))
        rightYAxis.axisId = "RightAxisId"
        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.axisAlignment = .left
        leftYAxis.style.labelStyle.colorCode = 0xFF4083B7
        
        let fourierSeries = DataManager.getFourierSeries(withAmplitude: 1.0, phaseShift: 0.1, count: 5000)
        let dampedSinewave = DataManager.getDampedSinewave(withPad: 1500, amplitude: 3.0, phase: 0.0, dampingFactor: 0.005, pointCount: 5000, freq: 10)
        
        let mountainDataSeries = SCIXyDataSeries(xType: .double, yType: .double)
        let lineDataSeries = SCIXyDataSeries(xType: .double, yType: .double)
        
        mountainDataSeries.appendRangeX(fourierSeries!.xValues, y: fourierSeries!.yValues, count: fourierSeries!.size)
        lineDataSeries.appendRangeX(dampedSinewave!.xValues, y: dampedSinewave!.yValues, count: dampedSinewave!.size)
        
        let mountainSeries = SCIFastMountainRenderableSeries()
        mountainSeries.dataSeries = mountainDataSeries
        mountainSeries.areaStyle = SCISolidBrushStyle(colorCode: 0x771964FF)
        mountainSeries.strokeStyle = SCISolidPenStyle(colorCode: 0xFF0944CF, withThickness: 2.0)
        mountainSeries.yAxisId = "LeftAxisId"
        
        let lineSeries = SCIFastLineRenderableSeries()
        lineSeries.dataSeries = lineDataSeries
        lineSeries.strokeStyle = SCISolidPenStyle(colorCode: 0xFF279B27, withThickness: 2.0)
        lineSeries.yAxisId = "RightAxisId"
        
        let leftYAxisDM = SCIYAxisDragModifier()
        leftYAxisDM.axisId = "LeftAxisId"
        
        let rightYAxisDM = SCIYAxisDragModifier()
        rightYAxisDM.axisId = "RightAxisId"
        
        SCIUpdateSuspender.usingWithSuspendable(surface) {
            self.surface.xAxes.add(xAxis)
            self.surface.yAxes.add(leftYAxis)
            self.surface.yAxes.add(rightYAxis)
            self.surface.renderableSeries.add(mountainSeries)
            self.surface.renderableSeries.add(lineSeries)
            self.surface.chartModifiers = SCIChartModifierCollection(childModifiers: [SCIXAxisDragModifier(), leftYAxisDM, rightYAxisDM, SCIZoomExtentsModifier()])
            
            mountainSeries.addAnimation(SCIWaveRenderableSeriesAnimation(duration: 3, curveAnimation: .easeInOut))
            lineSeries.addAnimation(SCISweepRenderableSeriesAnimation(duration: 3, curveAnimation: .easeInOut))
        }
    }
}

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