horizontal bar graph value different decimal places each time

[hiralnaik]

Hi There

I am always seeing different decimal places on the bar. I want to stick with 1 decimal only. Can someone please help with it ?

var yVals = [ChartDataEntry]() yVals.append(BarChartDataEntry(value: previousYear, xIndex: 0)) yVals.append(BarChartDataEntry(value: currentYear, xIndex: 1))

Thanks
Hiral

[dxclancy]

Valueformatter

[hiralnaik]

I tried with it but it is still showing random decimal places.

Here is the code

`self.setupBarLineChartView(self.chartView)
self.chartView.delegate = self
self.chartView.descriptionText = ""
self.chartView.noDataTextDescription = "Data not available"
self.chartView.drawBarShadowEnabled = false
self.chartView.drawValueAboveBarEnabled = true

    let xAxis = self.chartView.xAxis
    xAxis.labelPosition = ChartXAxis.LabelPosition.Bottom
    xAxis.labelFont = UIFont(name: "HelveticaNeue", size: 8)!
    xAxis.drawAxisLineEnabled = true
    xAxis.drawGridLinesEnabled = false
    xAxis.gridLineWidth = 0.3
    xAxis.wordWrapEnabled = true

    let leftAxis = self.chartView.leftAxis
    leftAxis.enabled = false
    leftAxis.labelFont = UIFont(name: "HelveticaNeue", size: 8)!
    leftAxis.drawAxisLineEnabled = true
    leftAxis.drawGridLinesEnabled = false
    leftAxis.gridLineWidth = 0.3
    leftAxis.axisMinValue = 0.0 // this replaces startAtZero = YES

    let rightAxis = self.chartView.rightAxis
    rightAxis.enabled = false
    rightAxis.labelFont = UIFont(name: "HelveticaNeue", size: 7)!
    rightAxis.drawAxisLineEnabled = true
    rightAxis.drawGridLinesEnabled = false
    rightAxis.axisMinValue = 0.0; // this replaces startAtZero = YES

    self.chartView.legend.horizontalAlignment = ChartLegend.HorizontalAlignment.Left
    self.chartView.legend.form = ChartLegend.Form.Circle
    self.chartView.legend.formSize = 8.0
    self.chartView.legend.font = UIFont(name: "HelveticaNeue", size: 8)!
    self.chartView.legend.xEntrySpace = 4.0
    self.chartView.animate(yAxisDuration: 1.5)

    self.chartView.extraRightOffset = CGFloat(30.0)

`

`func setDataCount(currentYear : Double, previousYear : Double) {

    var xVals = [NSObject]()

    xVals.append("Previous Year")
    xVals.append("Current Year")

    var yVals = [ChartDataEntry]()
    yVals.append(BarChartDataEntry(value: previousYear, xIndex: 0))
    yVals.append(BarChartDataEntry(value: currentYear, xIndex: 1))

    var set1 : BarChartDataSet? = nil

    if self.chartView.data?.dataSetCount > 0 {
        let temp = self.chartView.data?.dataSets[0] as! BarChartDataSet
        set1 = temp
        set1!.yVals = yVals
        self.chartView.data?.xValsObjc = xVals
        self.chartView.notifyDataSetChanged()

    } else {
        set1 = BarChartDataSet(yVals: yVals, label: "Dataet")
        set1?.colors = [UIColor.cbiBlueColor(), UIColor.orangeColor()]
        set1?.barSpace = 0.25
        var dataSets = [BarChartDataSet]()
        dataSets .append(set1!)

        let data : BarChartData = BarChartData(xVals: xVals, dataSets: dataSets)
        data.setValueFont(UIFont(name: "HelveticaNeue", size: 8)!)
        data.setValueTextColor(UIColor.blackColor())
        self.chartView.data = data
    }

    let percentage = self.calculatePercentageChangeForDisplay(currentYear, comparedValue: previousYear)
    let value = CBIFormattingUtility.sharedInstance.percentChangeFormatter.stringFromNumber(percentage)
    self.growthLabel.text = value

    self.growthLabel.textColor = UIColor.cbiYellowColor()
    if percentage != 0 {
        self.growthLabel.textColor = percentage < 0 ? UIColor.cbiRedColor() : UIColor.cbiGreenColor()
    }
}

`

[liuxuan30]

use maximumFractionDigits = 1

[hiralnaik]

I tried maximum fraction digit to 1 but it is still not happening. I don't know what happen ?

[liuxuan30]

where do you set it?

[hiralnaik]

I mean I put it in my code and run it but it is still not doing it.

I set it right after rightAxis.rightAxisMinVal = 0.0.

I set it maximum fraction digit to 1 but still not doing it.

I don't know if I miss anything in the code.

[liuxuan30]

it should be used in your data set's value formatter.

[liuxuan30]

also, are you saying two digits after decimal? Not quite clear what are you asking, so I took a guess you want to show only one digit. Like 5.00 -> 5.0

[hiralnaik]

Yes I want to display 5.0. But it is displaying 5.234, 5.23, 5.2 etc.

[liuxuan30]

then use maximumFractionDigits = 1.

[hiralnaik]

Thanks for look into it but I am 100% sure it is not happening with my Swift code. Below is the view controller code, if you can please take a look what am i doing wrong ?

`import UIKit
import Charts
class GraphViewController: UIViewController, ChartViewDelegate {
@IBOutlet var chartView: HorizontalBarChartView!
@IBOutlet weak var growthLabel: UILabel!
@IBOutlet weak var volumeDepletionLabel: UILabel!

override func viewDidLoad() {
    super.viewDidLoad()

}

/**
 Setup UI Elments for the view controller
 */
func setupUI() -> Void {
    self.chartView.delegate = self
    self.chartView.descriptionText = ""
    self.chartView.noDataTextDescription = "Data not available"
    self.chartView.drawBarShadowEnabled = false
    self.chartView.drawValueAboveBarEnabled = true

    let xAxis = self.chartView.xAxis
    xAxis.labelPosition = ChartXAxis.LabelPosition.Bottom
    xAxis.labelFont = UIFont(name: "HelveticaNeue", size: 8)!
    xAxis.drawAxisLineEnabled = true
    xAxis.drawGridLinesEnabled = false
    xAxis.gridLineWidth = 0.3
    xAxis.wordWrapEnabled = true

    let leftAxis = self.chartView.leftAxis
    leftAxis.enabled = false
    leftAxis.labelFont = UIFont(name: "HelveticaNeue", size: 8)!
    leftAxis.drawAxisLineEnabled = true
    leftAxis.drawGridLinesEnabled = false
    leftAxis.gridLineWidth = 0.3
    leftAxis.axisMinValue = 0.0 // this replaces startAtZero = YES

    let rightAxis = self.chartView.rightAxis
    rightAxis.enabled = false
    rightAxis.labelFont = UIFont(name: "HelveticaNeue", size: 7)!
    rightAxis.drawAxisLineEnabled = true
    rightAxis.drawGridLinesEnabled = false
    rightAxis.axisMinValue = 0.0; // this replaces startAtZero = YES
    rightAxis.valueFormatter = NSNumberFormatter()
    rightAxis.valueFormatter?.maximumFractionDigits = 1

    self.chartView.legend.horizontalAlignment = ChartLegend.HorizontalAlignment.Left
    self.chartView.legend.form = ChartLegend.Form.Circle
    self.chartView.legend.formSize = 8.0
    self.chartView.legend.font = UIFont(name: "HelveticaNeue", size: 8)!
    self.chartView.legend.xEntrySpace = 4.0
    self.chartView.animate(yAxisDuration: 1.5)

    self.chartView.extraRightOffset = CGFloat(30.0)

}

override func didReceiveMemoryWarning() {
    super.didReceiveMemoryWarning()
    // Dispose of any resources that can be recreated.
}

/**
 Set Data for the graph

 - parameter currentYear:  current year 
 - parameter previousYear: previous year 
 */
func setDataCount(currentYear : Double, previousYear : Double) {

    var xVals = [NSObject]()

    xVals.append("Previous Year")
    xVals.append("Current Year")

    var yVals = [ChartDataEntry]()
    yVals.append(BarChartDataEntry(value: previousYear, xIndex: 0))
    yVals.append(BarChartDataEntry(value: currentYear, xIndex: 1))

    var set1 : BarChartDataSet? = nil

    if self.chartView.data?.dataSetCount > 0 {
        let temp = self.chartView.data?.dataSets[0] as! BarChartDataSet
        set1 = temp
        set1!.yVals = yVals
        self.chartView.data?.xValsObjc = xVals
        self.chartView.notifyDataSetChanged()

    } else {
        set1 = BarChartDataSet(yVals: yVals, label: "Dataet")
        set1?.colors = [UIColor.cbiBlueColor(), UIColor.orangeColor()]
        set1?.barSpace = 0.25
        var dataSets = [BarChartDataSet]()
        dataSets .append(set1!)

        let data : BarChartData = BarChartData(xVals: xVals, dataSets: dataSets)
        data.setValueFont(UIFont(name: "HelveticaNeue", size: 8)!)
        data.setValueTextColor(UIColor.blackColor())
        self.chartView.data = data
    }

    let percentage = self.calculatePercentageChangeForDisplay(currentYear, comparedValue: previousYear)
    let value = CBIFormattingUtility.sharedInstance.percentChangeFormatter.stringFromNumber(percentage)
    self.growthLabel.text = value

    self.growthLabel.textColor = UIColor.cbiYellowColor()
    if percentage != 0 {
        self.growthLabel.textColor = percentage < 0 ? UIColor.cbiRedColor() : UIColor.cbiGreenColor()
    }
}

internal func chartValueSelected(chartView: ChartViewBase, entry: ChartDataEntry, dataSetIndex: Int, highlight: ChartHighlight) {

    print("Hello There")
}

/**
 Calculating percentage change for the SKU

 - parameter currentValue:  current
 - parameter comparedValue: previous

 - returns: percentage value
 */
func calculatePercentageChangeForDisplay(currentValue : Double, comparedValue : Double) -> Double {

    if comparedValue <= 0 {
        if currentValue == 0 {
            return 0
        } else if currentValue > 0 {
            return 1
        } else {
            return -1
        }
    } else {
        return (comparedValue == (0)) ? (currentValue - comparedValue) : (currentValue - comparedValue) / comparedValue
    }
}

}
`

[hiralnaik]

Oops never mind. I just resolved the issue. It is issue with my code.

let data : BarChartData = BarChartData(xVals: xVals, dataSets: dataSets) data.setValueFormatter(CBIFormattingUtility.sharedInstance.valueChangeFormatterForGraph) data.setValueFont(UIFont(name: "HelveticaNeue", size: 8)!) data.setValueTextColor(UIColor.blackColor()) self.chartView.data = data