Chart Data Limitations

Please read the Chart Data section of the Google Chart Api Developer's Guide. Even though this library attempts to abstract encoding datasets you should read enough to understand the limitations of the Api.

A dataset of type int.md with values less than or equal to 61 will be encoded using simple encoding.

A dataset of type int.md with values less than or equal to 4095 will be encoded using extended encoding.

A dataset of type float.md with values less than or equal to 100 will be encoded using text encoding.

Single Dataset

A single dataset can be contained in either an int.md or a float.md. You set a chart's data set using the Chart.SetData() method.

For example: ``` using GoogleChartSharp;

/* Create a single integer dataset */ int[] intData = new int[] {0, 10, 20, 30, 40};

/* Create a single float dataset */ float[] floatData = new float[] {0.0, 0.5, 1.0, 1.5, 2.0};

/* Create a new line chart with width 150 and height 150. The default line chart uses one data set per line, evenly spacing the data points out along the x axis. */ LineChart lineChart = new LineChart(150, 150);

/* Set the chart to use the integer dataset */ lineChart.SetData(intData); string url = lineChart.GetUrl();

/* Set the chart to use the float dataset */ lineChart.SetData(floatData); string otherUrl = lineChart.GetUrl(); ```

Multiple Datasets

A chart can also use multiple datasets. The datasets (of type int.md or float.md) must be contained in a data structure that implements the ICollection interface. ``` using GoogleChartSharp;

/* This pair of datasets describes a line. The first set is the X axis coordinated and the second set is the Y axis coordinates. */ int[] xCoords = new int[] {0, 10, 20, 30, 40}; int[] yCoords = new int[] {0, 10, 20, 30, 40};

/* Add the pair of datasets to the collection. To draw multiple lines on the chart add additional dataset pairs to the collection. */ List datasets = new List(); line1.Add(xCoords); line1.Add(yCoords);

/* Note that we have to specify a MultiDataSet line chart type. */ LineChart lineChart = new LineChart(150, 150, LineChartType.MultiDataSet); lineChart.SetData(datasets); string url = lineChart.GetUrl(); ```

Missing Values

In all dataset types a missing value should be represented by a -1. int[] intData = new int[] { 0, 10, -1, 30, 40}; float[] floatData = new float[] { 0.0, 0.5, -1, 1.5, 2.0 };