Convert decimal to integer on line chart - ios

Question

I am using this lib chart : https://github.com/danielgindi/Charts
I have one line chart. Which will display values on x axis. But now it's showing in decimal like 22.0. But i want like 22
Here is my code :
func updateGraphMaster(xAxisLabel: String) {
var lineChartEntry = [ChartDataEntry]()
for num in 0..<chartDataDoubles.count {
let value = ChartDataEntry(x: Double(num), y: chartDataDoubles[num])
lineChartEntry.append(value)
}
let lineChartDataSet = LineChartDataSet(entries: lineChartEntry, label: xAxisLabel)
lineChartDataSet.colors = [NSUIColor.white]
lineChartDataSet.highlightEnabled = true
lineChartDataSet.highlightColor = UIColor.white
lineChartDataSet.drawVerticalHighlightIndicatorEnabled = false
lineChartDataSet.drawHorizontalHighlightIndicatorEnabled = false
lineChartDataSet.drawValuesEnabled = true
lineChartDataSet.drawCirclesEnabled = false
lineChartDataSet.drawCircleHoleEnabled = false
let gradient = getGradientFilling()
lineChartDataSet.fill = Fill.fillWithLinearGradient(gradient, angle: 90.0)
lineChartDataSet.drawFilledEnabled = true
let data = LineChartData()
data.addDataSet(lineChartDataSet)
data.setDrawValues(false)
data.setValueTextColor(NSUIColor.white)
let formatter = NumberFormatter()
formatter.maximumFractionDigits = 0
formatter.numberStyle = .none
formatter.locale = .current
//lineChartDataSet.valueFormatter = DefaultValueFormatter(formatter: formatter)
data.setValueFormatter(DefaultValueFormatter(formatter: formatter))
chartView.data = data
chartView.xAxis.valueFormatter = DefaultAxisValueFormatter(formatter: formatter)
}
Here i using setValueFormatter and append the data to chart view. But still it's showing in decimal . Not in integer.

Answer 1

if you want to edit the data set value format itself not the axis, try this:
data.valueFormatter = DefaultValueFormatter(decimals: 0)
I hope It works!
It seems that you have more than 1 data set to show on chart?

Answer 2

Your question was unclear to me until you showed us a screenshot
You were not asking for the actual drawn values to be formatted, you were asking to format the value displayed by the label of the marker that appears when you click a point. For that implementation, I had to presume you used the custom class BalloonMarker from the Charts-Demo, which does not format the value of its text before being displayed. I was able to reproduce your issue and fix it: note the lines 184-187 of BalloonMarker.swift:
184 open override func refreshContent(entry: ChartDataEntry, highlight: Highlight)
185 {
186 setLabel(String(entry.y))
187 }
Line 186 needs to be replaced with
186 setLabel(String(format: "%.0f", entry.y))
That should fix your issue. I include my reproduction and fix for you below:
Reproduction of your issue
With Fix
Additionally, if you wish to ensure your x-axis shows only integers you need to do the following:
let formatter = NumberFormatter()
formatter.maximumFractionDigits = 0
formatter.numberStyle = .none
formatter.locale = .current
chartView.xAxis.valueFormatter = DefaultAxisValueFormatter(formatter: formatter)

Answer 3

You want to set formatter.maximumFractionDigits to zero.