BarGraph - 0 values - Bar Offset

[denebj]

I have an issue of the weird spacing when I have 0 values in my bar graph.

So I just created a default bar chart with a 0 value and I have the issue - I tried to get as close as possible to a simple bar to see what was the issue.

It looks like the demo but a soon as I put a 0 value , I get a padding.

Here the sample code :

@IBOutlet var barChartView: BarChartView!

func viewDidLoad() {
super.viewDidLoad()
self.styleChart()
self.configureChart()
}

internal func styleChart() {
    self.barChartView.xAxis.labelPosition = .bottom
    self.barChartView.xAxis.labelCount = 2
}

internal func configureChart() {
    
    var xValues = [String]()
    var entries: [ChartDataEntry] = Array()

     xValues.append("TEST 5")
     xValues.append("TEST 0")
     entries.append(BarChartDataEntry(x: Double(0), y: Double(5) ))
     entries.append(BarChartDataEntry(x: Double(1), y: Double(0) ))
    
    
    let dataSet = BarChartDataSet(values: entries, label: "")
    dataSet.drawIconsEnabled = false
    dataSet.drawValuesEnabled = true

    let formatter = NumberFormatter()
    formatter.numberStyle = NumberFormatter.Style.decimal
    dataSet.valueFormatter = DefaultValueFormatter(formatter: formatter)

    let barChartData = BarChartData(dataSet: dataSet)
    barChartData.barWidth = 0.2        
     self.barChartView.data = barChartData
}

Pretty straightforward.

It is a bug ?

Issue with 0 :

No 0 :

[liuxuan30]

not really. The y axis range is calculated by your data range. To keep your chart inside the canvas, the axis range will be larger than your data range. Check out computeAxisValues() to have a good understanding how it generate the ranges.

If you want the y axis always starts from 0, set leftAxis.axisMinimum = 0

[denebj]

Ah ok :) Thank you for the explanation !