Bar Chart

A bar chart provides a way of showing data values represented as vertical bars. It is sometimes used to show trend data, and the comparison of multiple data sets side by side.

Dataset Properties

Namespaces:

• data.datasets[index] – options for this dataset only
• options.datasets.bar – options for all bar datasets
• options.elements.bar – options for all bar elements
• options – options for the whole chart

The bar chart allows a number of properties to be specified for each dataset. These are used to set display properties for a specific dataset. For example, the color of the bars is generally set this way. Only the data option needs to be specified in the dataset namespace.

borderSkipped

This setting is used to avoid drawing the bar stroke at the base of the fill, or disable the border radius. In general, this does not need to be changed except when creating chart types that derive from a bar chart.

borderWidth

If this value is a number, it is applied to all sides of the rectangle (left, top, right, bottom), except borderSkipped. If this value is an object, the left property defines the left border width. Similarly, the right, top, and bottom properties can also be specified. Omitted borders and borderSkipped are skipped.

borderRadius

If this value is a number, it is applied to all corners of the rectangle (topLeft, topRight, bottomLeft, bottomRight), except corners touching the borderSkipped. If this value is an object, the topLeft property defines the top-left corners border radius. Similarly, the topRight, bottomLeft, and bottomRight properties can also be specified. Omitted corners and those touching the borderSkipped are skipped. For example if the top border is skipped, the border radius for the corners topLeft and topRight will be skipped as well.

inflateAmount

This option can be used to inflate the rects that are used to draw the bars. This can be used to hide artifacts between bars when barPercentage(#barpercentage) * categoryPercentage(#categorypercentage) is 1. The default value 'auto' should work in most cases

barPercentage

Percent (0-1) of the available width each bar should be within the category width. 1.0 will take the whole category width and put the bars right next to each other. more…

categoryPercentage

Percent (0-1) of the available width each category should be within the sample width. more…

barThickness

If this value is a number, it is applied to the width of each bar, in pixels. When this is enforced, barPercentage and categoryPercentage are ignored.

If set to 'flex', the base sample widths are calculated automatically based on the previous and following samples so that they take the full available widths without overlap. Then, bars are sized using barPercentage and categoryPercentage. There is no gap when the percentage options are 1. This mode generates bars with different widths when data are not evenly spaced.

If not set (default), the base sample widths are calculated using the smallest interval that prevents bar overlapping, and bars are sized using barPercentage and categoryPercentage. This mode always generates bars equally sized.

maxBarThickness

Set this to ensure that bars are not sized thicker than this