Monthly Sales
A line chart is a way of plotting data points on a line. Often, it is used to show trend data, and the comparison of two data sets.
The line chart requires an array of labels for each of the data points. This is shown on the X axis. The data for line charts is broken up into an array of datasets. Each dataset has a colour for the fill, a colour for the line and colours for the points and strokes of the points. These colours are strings just like CSS. You can use RGBA, RGB, HEX or HSL notation.
The label key on each dataset is optional, and can be used when generating a scale for the chart.
Bar Chart
A bar chart is a way of showing data as bars. It is sometimes used to show trend data, and the comparison of multiple data sets side by side.
The bar chart has the a very similar data structure to the line chart, and has an array of datasets, each with colours and an array of data. Again, colours are in CSS format. We have an array of labels too for display. In the example, we are showing the same data as the previous line chart example.
The label key on each dataset is optional, and can be used when generating a scale for the chart.
Radar Chart
A radar chart is a way of showing multiple data points and the variation between them.
They are often useful for comparing the points of two or more different data sets.
For a radar chart, to provide context of what each point means, we include an array of strings that show around each point in the chart. For the radar chart data, we have an array of datasets. Each of these is an object, with a fill colour, a stroke colour, a colour for the fill of each point, and a colour for the stroke of each point. We also have an array of data values.