[feature request] support fixed yAxis interval and xAxis labelCount

[liuxuan30]

Setting yAxis.labelCount will not always get the same count. For example radar chart, if I set the yAxis.labelCount to be 3, I may get 5 label displayed. This is caused by computeAxisValues(min yMin: Double, max yMax: Double) has some logic to compute the intervals. This is sometimes confusing since I want to the final labelCount to be same as what I set.

Adaptive compue is a very good design, but sometimes people just want that smart. Supporting fixed labelCount for both xAxis and yAxis gives another choice.

[danielgindi]

I actually do not completely understand the requirement...

[liuxuan30]

At first, I thought setting yAxis.labelCount will lead to setting the 'interval' on yAxis. Take an example,

If I set yAxis.labelCount = 3, and the yMax value is 5, I hope there are only 3 labels on the yAxis, like [0,3,6] as the labels. If I set to 6, may be [0,1,2,3,4,5].

However, it turned out that setting yAxis.labelCount will not always get the same count as we want. It will have +1/-1 deviation.

computeAxisValues(min yMin: Double, max yMax: Double) will calculate how many values.

What I want is a 'fixed' count. Setting yAxis.labelCount but results in another count of labels displayed is kind of confusing.

[danielgindi]

Well for obvious reasons this number cannot be fixed, and only be approximated. Like any other such calculation... It is also, btw, specified in the docs :-)

[danielgindi]

/// the number of label entries the y-axis should have
/// max = 25,
/// min = 2,
/// default = 6,
/// be aware that this number is not fixed and can only be approximated

[carrchr]

I'm not very good with Swift, yet, otherwise I would try tackling it myself. Have you looked at MPAndroidChart feature: Added feature that allows the label-count to be exactly set and evenl...
Will this be possible in ios-charts?

[danielgindi]

It exists already edd9c2e