// iOS Chart Examples

SciChart’s OpenGLES iOS Chart library ships with ~60 Objective-C and Swift 4 iOS Chart Examples which you can browse, play with, view the source-code and even export each iOS Objective-C / Swift Chart Example to a stand-alone XCode project. All of this is possible with the new and improved SciChart iOS Examples Suite, which ships as part of the SciChart iOS SDK.

DOWNLOAD THE IOS CHART EXAMPLES

// iOS Chart Logarithmic Axis Example

This example demonstrates iOS Charts with X or Y logarithmic axis using SciChart.iOS.

The SCILogarithmicNumericAxis type can be set on the XAxis or YAxis of the SCIChartSurface in order to add a logarithmic scale to an iOS chart.

The Logarithmic Base may be set as a double value to change the Logarithmic Base of the axis, e.g. Log10, LogE, Log2.

Axis labels are formatted using Scientific notation with Superscript.

// Source Code

The Swift 4 and Objective-C source code for the iOS Chart Logarithmic Axis Example example is included below (Scroll down!).

Did you know you can also view the source code from one of the following sources as well?

Clone the SciChart.iOS.Examples from Github.
Or, view source and export each example to an XCode project from the Obj-C version of the SciChart iOS Examples app.
Also the SciChart iOS Trial contains the full source for the examples (link below).

DOWNLOAD THE IOS CHART EXAMPLES

iOS Chart Logarithmic Axis Example - View and Export Source Code

// LogarithmicAxisChartView.swift

//******************************************************************************
// SCICHARTÂ® Copyright SciChart Ltd. 2011-2018. All rights reserved.
//
// Web: http://www.scichart.com
// Support: support@scichart.com
// Sales:   sales@scichart.com
//
// LogarithmicAxisChartView.swift is part of the SCICHARTÂ® 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 SCICHARTÂ® 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 LogarithmicAxisChartView: SingleChartLayout {

    override func initExample() {
        let xAxis = SCILogarithmicNumericAxis()
        xAxis.growBy = SCIDoubleRange(min: SCIGeneric(0.1), max: SCIGeneric(0.1))
        xAxis.scientificNotation = .logarithmicBase
        xAxis.textFormatting = "#.#E+0"
        
        let yAxis = SCILogarithmicNumericAxis()
        yAxis.growBy = SCIDoubleRange(min: SCIGeneric(0.1), max: SCIGeneric(0.1))
        yAxis.scientificNotation = .logarithmicBase
        yAxis.textFormatting = "#.#E+0"

        let dataSeries1 = SCIXyDataSeries(xType: .double, yType: .double)
        dataSeries1.seriesName = "Curve A"
        let dataSeries2 = SCIXyDataSeries(xType: .double, yType: .double)
        dataSeries2.seriesName = "Curve B"
        let dataSeries3 = SCIXyDataSeries(xType: .double, yType: .double)
        dataSeries3.seriesName = "Curve C"

        let doubleSeries1 = DataManager.getExponentialCurve(withExponent: 1.8, count: 100)
        let doubleSeries2 = DataManager.getExponentialCurve(withExponent: 2.25, count: 100)
        let doubleSeries3 = DataManager.getExponentialCurve(withExponent: 3.59, count: 100)
        
        dataSeries1.appendRangeX(doubleSeries1!.xValues, y: doubleSeries1!.yValues, count: doubleSeries1!.size)
        dataSeries2.appendRangeX(doubleSeries2!.xValues, y: doubleSeries2!.yValues, count: doubleSeries2!.size)
        dataSeries3.appendRangeX(doubleSeries3!.xValues, y: doubleSeries3!.yValues, count: doubleSeries3!.size)
        
        let line1Color: UInt32 = 0xFFFFFF00
        let line2Color: UInt32 = 0xFF279B27
        let line3Color: UInt32 = 0xFFFF1919
        
        let line1 = SCIFastLineRenderableSeries()
        line1.dataSeries = dataSeries1
        line1.strokeStyle = SCISolidPenStyle(colorCode: line1Color, withThickness: 1.5)
        line1.pointMarker = getPointMarker(size: 5, colorCode: line1Color)

        let line2 = SCIFastLineRenderableSeries()
        line2.dataSeries = dataSeries2
        line2.strokeStyle = SCISolidPenStyle(colorCode: line2Color, withThickness: 1.5)
        line2.style.pointMarker = getPointMarker(size: 5, colorCode: line2Color)
        
        let line3 = SCIFastLineRenderableSeries()
        line3.dataSeries = dataSeries3
        line3.strokeStyle = SCISolidPenStyle(colorCode: line3Color, withThickness: 1.5)
        line3.style.pointMarker = getPointMarker(size: 5, colorCode: line3Color)
        
        SCIUpdateSuspender.usingWithSuspendable(surface) {
            self.surface.xAxes.add(xAxis)
            self.surface.yAxes.add(yAxis)
            self.surface.renderableSeries.add(line1)
            self.surface.renderableSeries.add(line2)
            self.surface.renderableSeries.add(line3)
            self.surface.chartModifiers = SCIChartModifierCollection(childModifiers: [SCIPinchZoomModifier(), SCIZoomPanModifier(), SCIZoomExtentsModifier()])
            
            line1.addAnimation(SCISweepRenderableSeriesAnimation(duration: 3, curveAnimation: .easeOut))
            line2.addAnimation(SCISweepRenderableSeriesAnimation(duration: 3, curveAnimation: .easeOut))
            line3.addAnimation(SCISweepRenderableSeriesAnimation(duration: 3, curveAnimation: .easeOut))
        }
    }

    fileprivate func getPointMarker(size: Int, colorCode: UInt32) -> SCIEllipsePointMarker {
        let pointMarker = SCIEllipsePointMarker()
        pointMarker.width = Float(size)
        pointMarker.height = Float(size)
        pointMarker.strokeStyle = nil
        pointMarker.fillStyle = SCISolidBrushStyle(colorCode: colorCode)
        
        return pointMarker
    }
}

// LogarithmicAxisChartView.m

//******************************************************************************
// SCICHARTÂ® Copyright SciChart Ltd. 2011-2018. All rights reserved.
//
// Web: http://www.scichart.com
// Support: support@scichart.com
// Sales:   sales@scichart.com
//
// LogarithmicAxisChartView.m is part of the SCICHARTÂ® 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 SCICHARTÂ® 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 "LogarithmicAxisChartView.h"
#import "DataManager.h"

@implementation LogarithmicAxisChartView

- (void)initExample {
    SCILogarithmicNumericAxis * xAxis = [SCILogarithmicNumericAxis new];
    xAxis.growBy = [[SCIDoubleRange alloc] initWithMin:SCIGeneric(0.1) Max:SCIGeneric(0.1)];
    xAxis.scientificNotation = SCIScientificNotation_LogarithmicBase;
    xAxis.textFormatting = @"#.#E+0";

    SCILogarithmicNumericAxis * yAxis = [SCILogarithmicNumericAxis new];
    yAxis.growBy = [[SCIDoubleRange alloc] initWithMin:SCIGeneric(0.1) Max:SCIGeneric(0.1)];
    yAxis.scientificNotation = SCIScientificNotation_LogarithmicBase;
    yAxis.textFormatting = @"#.#E+0";
    
    SCIXyDataSeries * dataSeries1 = [[SCIXyDataSeries alloc] initWithXType:SCIDataType_Double YType:SCIDataType_Double];
    dataSeries1.seriesName = @"Curve A";
    SCIXyDataSeries * dataSeries2 = [[SCIXyDataSeries alloc] initWithXType:SCIDataType_Double YType:SCIDataType_Double];
    dataSeries2.seriesName = @"Curve B";
    SCIXyDataSeries * dataSeries3 = [[SCIXyDataSeries alloc] initWithXType:SCIDataType_Double YType:SCIDataType_Double];
    dataSeries3.seriesName = @"Curve C";
    
    DoubleSeries * doubleSeries1 = [DataManager getExponentialCurveWithExponent:1.8 count:100];
    DoubleSeries * doubleSeries2 = [DataManager getExponentialCurveWithExponent:2.25 count:100];
    DoubleSeries * doubleSeries3 = [DataManager getExponentialCurveWithExponent:3.59 count:100];
    
    [dataSeries1 appendRangeX:doubleSeries1.xValues Y:doubleSeries1.yValues Count:doubleSeries1.size];
    [dataSeries2 appendRangeX:doubleSeries2.xValues Y:doubleSeries2.yValues Count:doubleSeries2.size];
    [dataSeries3 appendRangeX:doubleSeries3.xValues Y:doubleSeries3.yValues Count:doubleSeries3.size];

    uint line1Color = 0xFFFFFF00;
    uint line2Color = 0xFF279B27;
    uint line3Color = 0xFFFF1919;
    
    SCIFastLineRenderableSeries * line1 = [SCIFastLineRenderableSeries new];
    line1.dataSeries = dataSeries1;
    line1.strokeStyle = [[SCISolidPenStyle alloc] initWithColorCode:line1Color withThickness:1.5];
    line1.pointMarker = [self getPointMarkerWithSize:5 colorCode:line1Color];

    SCIFastLineRenderableSeries * line2 = [SCIFastLineRenderableSeries new];
    line2.dataSeries = dataSeries2;
    line2.strokeStyle = [[SCISolidPenStyle alloc] initWithColorCode:line2Color withThickness:1.5];
    line2.pointMarker = [self getPointMarkerWithSize:5 colorCode:line2Color];
    
    SCIFastLineRenderableSeries * line3 = [SCIFastLineRenderableSeries new];
    line3.dataSeries = dataSeries3;
    line3.strokeStyle = [[SCISolidPenStyle alloc] initWithColorCode:line3Color withThickness:1.5];
    line3.pointMarker = [self getPointMarkerWithSize:5 colorCode:line3Color];
    
    [SCIUpdateSuspender usingWithSuspendable:self.surface withBlock:^{
        [self.surface.xAxes add:xAxis];
        [self.surface.yAxes add:yAxis];
        [self.surface.renderableSeries add:line1];
        [self.surface.renderableSeries add:line2];
        [self.surface.renderableSeries add:line3];
        self.surface.chartModifiers = [[SCIChartModifierCollection alloc] initWithChildModifiers:@[[SCIPinchZoomModifier new], [SCIZoomPanModifier new], [SCIZoomExtentsModifier new]]];
        
        [line1 addAnimation:[[SCISweepRenderableSeriesAnimation alloc] initWithDuration:3 curveAnimation:SCIAnimationCurve_EaseOut]];
        [line2 addAnimation:[[SCISweepRenderableSeriesAnimation alloc] initWithDuration:3 curveAnimation:SCIAnimationCurve_EaseOut]];
        [line3 addAnimation:[[SCISweepRenderableSeriesAnimation alloc] initWithDuration:3 curveAnimation:SCIAnimationCurve_EaseOut]];
    }];
}

- (SCIEllipsePointMarker *)getPointMarkerWithSize:(int)size colorCode:(uint)colorCode {
    SCIEllipsePointMarker * pointMarker = [SCIEllipsePointMarker new];
    pointMarker.height = size;
    pointMarker.width = size;
    pointMarker.strokeStyle = nil;
    pointMarker.fillStyle = [[SCISolidBrushStyle alloc]initWithColorCode:colorCode];
    
    return pointMarker;
}

@end

< BACK TO ALL IOS CHART CHART EXAMPLES

iOS Chart Logarithmic Axis Example

// iOS Chart Examples

// iOS Chart Logarithmic Axis Example

// Source Code

// LogarithmicAxisChartView.swift

// LogarithmicAxisChartView.m

IOS CHART EXAMPLES

2D Charts

Basic Chart Types

Chart Annotations

Create a Multiseries Chart

Create Custom Charts

Create Realtime Charts

Create Stock Charts

Legends

Link Multiple Charts

Manipulate Series

Modify Axis Behavior

Styling and Theming

Tooltips and Hit Test

Zoom and Pan a Chart

Featured Apps

Medical Charts

Performance Demos

Scientific Charts