Point Series
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Topic Overview

Purpose

This topic provides a conceptual overview of the Point series in the IGChartView™ control and uses a code example to demonstrate how to add it to the chart view.

In this topic


Introduction

Point series summary

The Point series is one of the chart types belonging to the category series and uses points or markers on a chart when rendered. The numeric values correspond to y-axis (IGNumericYAxis), and the x-axis (IGCategoryXAxis or IGCategoryDateTimeXAxis) is used for displaying the labels.

Data requirements

While the IGChartView control allows easy binding to your own data model, make sure to supply the appropriate amounts and types of data required by the series. If the data does not meet the minimum requirements, based on the type of series that you are using, the IGChartView will appear blank.

The following is a list of data requirements for the area series type:

  • Required – the data model must contain at least one numeric field for rendering the data.
  • Optional – the data model may contain an optional string or NSDate field for labels.

Adding a Point Series to the IGChartView – Code Example

Description

The code below uses the IGCategorySeriesDataSourceHelper to supply randomly generated data to a point series that first gets added to the IGChartView instance, and then the IGChartView is added as a subview of the current UIView.

Prerequisites

This code example requires the inclusion of the IGChartView framework, detail about how to add this framework can be found in the Adding the Chart Framework File topic.

Code

In Objective-C:

    NSMutableArray data = [[NSMutableArray alloc] init];
    for (int i = 0; i < 25; i++)
    {
        double value = arc4random() % 100;
        [data addObject:[[NSNumber alloc] initWithDouble:value]];
    }
    
    IGCategorySeriesDataSourceHelper *source = [[IGCategorySeriesDataSourceHelper alloc] init];
    source.values = data;
    
    IGChartView *infraChart = [[IGChartView alloc] initWithFrame:self.view.frame];
    [infraChart setAutoresizingMask:UIViewAutoresizingFlexibleWidth|UIViewAutoresizingFlexibleHeight];
    
    IGCategoryXAxis *xAxis = [[IGCategoryXAxis alloc] initWithKey:@"xAxis"];
    IGNumericYAxis *yAxis = [[IGNumericYAxis alloc] initWithKey:@"yAxis"];
    [infraChart addAxis:xAxis];
    [infraChart addAxis:yAxis];
    
    IGPointSeries *lineSeries = [[IGPointSeries alloc] initWithKey:@"pointSeries"];
    pointSeries.xAxis = xAxis;
    pointSeries.yAxis = yAxis;
    pointSeries.dataSource = source;
    
    [infraChart addSeries:pointSeries];
    [self.view addSubview:infraChart];

In C#:


List<NSObject> data = new List<NSObject>();
Random r = new Random();
for(int i = 0;i <25; i++)
{
double val = r.Next() % 100;
data.Add(new NSNumber(val));
}

IGCategoryDateSeriesDataSourceHelper source = new IGCategoryDateSeriesDataSourceHelper();
source.Values = data.ToArray();



IGChartView chart = new IGChartView(this.View.Frame);
chart.AutoresizingMask = UIViewAutoresizing.FlexibleHeight | UIViewAutoresizing.FlexibleWidth;

this.View.AddSubview(chart);


IGCategoryXAxis xAxis = new IGCategoryXAxis("xAxis");
IGNumericYAxis yAxis = new IGNumericYAxis("yAxis");
chart.AddAxis(xAxis);
chart.AddAxis(yAxis);


IGPointSeries series= new IGPointSeries ("series");
series.XAxis = xAxis;
series.YAxis = yAxis;
series.DataSource = source;

chart.AddSeries(columnSeries);


Related Content

Topics

The following topics provide additional information related to this topic.

Topic

Purpose

This is a group of topics explaining the various types of Category series supported by the IGChartView control.