Y-axis is repeating values - iOS Charts

Question

In the iOS Chart Framework the y-values in the chart are repeating. As shown in the picture below there are multiple 0's and 1's in the chart. Is there anyway I can customize this chart so there aren't any repeating y-values. So in this scenario ideally the y-values should be 1,2,3,4,5. I just don't want the y-values to repeat itself.

Looks like whatever is formatting the y-axis values is rounding to 0 decimal places. — Douglas Hill, May 06 '16 at 03:04

score 7 · Accepted Answer · answered May 06 '16 at 07:16

7

you could also try:

/// When true, axis labels are controlled by the `granularity` property.
/// When false, axis values could possibly be repeated.
/// This could happen if two adjacent axis values are rounded to same value.
/// If using granularity this could be avoided by having fewer axis values visible.
public var granularityEnabled = false

and set yAxis.granularity = some value

answered May 06 '16 at 07:16

Wingzero

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Great! Thanks so much – Harish May 06 '16 at 12:37
1

Thank you, I added these 2 lines and it worked like a charm ! leftAxis.granularityEnabled = true leftAxis.granularity = 1 – Lilo Mar 29 '18 at 15:18

score 2 · Answer 2 · answered May 06 '16 at 03:08

That's because the y-axis values currently have fractional values between 0 and 1. Those numbers are really 0, 0.2, 0.4, 0.6, 0.8, and 1. To format them properly try modifying the valueFormatter on the ChartYAxis:

let yAxis = chart.leftAxis

let yAxisValueFormatter = NSNumberFormatter()
yAxisValueFormatter.usesSignificantDigits = true  // This will tell the formatter to display the decimal places
yAxis.valueFormatter = yAxisValueFormatter

The current range of the y-axis is 0 to 1 with 6 labels. If you add values greater than 1 then the range will automatically adjust. You can also use customAxisMax to force the max value if the current range is not suitable.

Y-axis is repeating values - iOS Charts

2 Answers2