Radar charts do not look good when all datasets are hidden

[panzarino]

Radar charts change to scales that include extremely long decimals which really do not look good when all datasets are disabled through the legend. For example, try disabling the two datasets on this chart in the documentation: http://www.chartjs.org/docs/#radar-chart-introduction.

[etimberg]

This is a string formatting mixed with javascript number problem. Not sure what the best course of action is in this case

[panzarino]

Round to a single decimal point?

[etimberg]

works in this case. Maybe the radialLinear scale should use the same function as the linear scale. https://github.com/chartjs/Chart.js/blob/master/src/scales/scale.linear.js#L10-L33

Essentially it tries to determine the correct number of data places dynamically.

[jewkesy]

Any idea why the scale would default back to -1 to 1, rather than maintain the data scale of 0 to 100 as in the example?

[etimberg]

@jewkesy I don't remember why [-1, 1] was chosen. I am fine with changing it

[jewkesy]

@etimberg The more I think about it, the more I think it is worth keeping [-1, 1].

Assuming that it is possible to change the data while hidden, I wouldn't want to see a fluctuating scale on an empty chart.

Also when the charts are scaled down on mobile devices, the scale is more legible when using a single digit.