![]() There are a number of config callbacks that can be used to change parameters in the scale at different points in the update process. That can be achieved by specifying stacked: 'single'. Additionally a stack option can be defined per dataset to further divide into stack groups more.įor some charts, you might want to stack positive and negative values together. If the stacked option of the value scale (y-axis on horizontal chart) is true, positive and negative values are stacked separately. # Stackingīy default data is not stacked. When these are set, some data points may not be visible. In contrast to the suggested* settings, the min and max settings set explicit ends to the axes. These are useful for extending the range of the axis while maintaining the auto fit behaviour. The suggestedMax and suggestedMin settings only change the data values that are used to scale the axis. Given the number of axis range settings, it is important to understand how they all interact with each other. Useful when ticks are drawn on chart area. ![]() If true, draw a background behind the tick labels. Sets the offset of the tick labels from the axis Returns the string representation of the tick value as it should be displayed on the chart. Please see specific axis documentation for all of the available tick options for that axis. These are only the common tick options supported by all axes. Higher weights are further away from the chart area. more.Īdjustment used when calculating the minimum data value. more.Īdjustment used when calculating the maximum data value. User defined maximum number for the scale, overrides maximum value from data. User defined minimum number for the scale, overrides minimum value from data. When display: 'auto', the axis is visible only if at least one associated dataset is visible. This allows changing the type of an axis for a chart.Ĭontrols the axis global visibility (visible when true, hidden when false). Custom scales can be created and registered with a string key. Please see specific axis documentation for all of the available options for that axis. These are only the common options supported by all axes. The following chart will have 'x' and 'y' scales: If no scale for an axis is found, a new scale is created. If the ID for an axis is not specified, first scale for that axis is used. The scaleId's that a dataset is mapped to, is determined by the xAxisID, yAxisID or rAxisID. For radial charts: 'r'.Įach dataset is mapped to a scale for each axis (x, y or r) it requires. The default scaleId's for carterian charts are 'x' and 'y'. New scale types can be extended without writing an entirely new chart type.A built-in label auto-skip feature detects would-be overlapping ticks and labels and removes every nth label to keep things displaying normally.Scales in Chart.js >v2.0 are significantly more powerful, but also different than those of v1.0. In a radial chart, such as a radar chart or a polar area chart, there is a single axis that maps points in the angular and radial directions. These axes are known as 'cartesian axes'. ![]() In a cartesian chart, there is 1 or more X-axis and 1 or more Y-axis to map points onto the 2-dimensional canvas. They are used to determine how data maps to a pixel value on the chart.
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