Charts: How to setup up y-axis with min, max value and a fixed step between the grid lines?

[SvenMuc]

Hi,
I'm just in the learning phase of using ios-charts. I like to change the x-axis grid to fixed values.
My plotted y-values are just int numbers like 1, 2, 3,..., 10. Nevertheless the left y-axis shows values like 6.3, 9.1, etc., depending on my zoom level.
The second question is, how to setup the x-axis in order to show the labels 1,5,10,15,....40?

Is there any way to influence the step size like e.g. in Excel?

// zoom y-axis to min/max value
lineChart.leftAxis.customAxisMin = max(0.0, lineChart.data!.yMin - 1.0)
lineChart.leftAxis.customAxisMax = min(10.0, lineChart.data!.yMax + 1.0)
lineChart.leftAxis.startAtZeroEnabled = false

Chart (min = 6.0 and max = 10.0):

The arrangement strongly depends on the min and max value.

Chart (min = 3.0 and max = 10.0):

Thanks for your support.

[SvenMuc]

I identified that something goes wrong in the function internal func computeAxisValues(#min: Double, max: Double) in the class ChartYAxisRenderer. But I do not understand the source code. The function is called 5 times.

What are the following lines exactly doing? Where is the labelCount defined?

var rawInterval = range / Double(labelCount)
var interval = ChartUtils.roundToNextSignificant(number: Double(rawInterval))
var intervalMagnitude = pow(10.0, round(log10(interval)))
var intervalSigDigit = (interval / intervalMagnitude)

[danielgindi]

You can specify customAxisMin/customAxisMax to whatever values you want

[SvenMuc]

What do you mean with whatever values you want? Are these values ignored?
How can I achieve a well aligned grid?

[danielgindi]

It means that you specify the minimum/maximum for the Y axis like you want. I'm kind of short on time right now but I wanted to give you an answer anyway, so you should just look at the axis features, or look at the demos :-)

[danielgindi]

If I have the time later I'll try to give you a more detailed answer

[SvenMuc]

Hi,
I solved the issue by analysing your source code. I forgot to set the labelCount.

            lineChart.leftAxis.customAxisMin = max(0.0, lineChart.data!.yMin - 1.0)
            lineChart.leftAxis.customAxisMax = min(10.0, lineChart.data!.yMax + 1.0)
            lineChart.leftAxis.labelCount = Int(lineChart.leftAxis.customAxisMax - lineChart.leftAxis.customAxisMin)
            lineChart.leftAxis.startAtZeroEnabled = false

[ramkrishna880]

My issue is that few cases y axis labels are not showing. (for bar and line graphs)

please help me to resolve this.

[sheetal-hemrom]

@ramkrishna880 setLabelsToSkip(0) in your Axis

[pranavBiz2Credit]

@danielgindi cant seem to access customAxisMin/customAxisMaxfor combined charts. Is there a way to fixate on the maximum and minimum values for Y-axis in Combined Chart?

[pranavBiz2Credit]

Hi again never mind figured this out..

axisMaximum/axisMinimum did the trick.

Such a marvellous plugin. You have no idea how easy you guys have made life for us developers.

A Massive Thank you!!

[haozhouxu]

you can set axis : MinValue="0" in xaml

[AwaisFayyaz]

Hi, Can any body tell me how to specify fixed intervals for y axis. I am using positive negative bar chart.
charts 3.1.1

like 1.1, 1.3, 1.5 intervals for y axis in positive negative bar chart. see the attached image

Thanks

[dawson86]

You can specify customAxisMin/customAxisMax to whatever values you want

Hi Daniel will these properties also work for Bar chart?