Multiple DataSet Error

[nhjariwala]

Earlier I have only one dataSet it works fine

    var xVals = Array<String>()
    for var i = 0 ; i < count ; i++ {
        xVals.append(months[i % 8])
    }

    var yValsTemp = Array<String>()
    for var i = 0 ; i < count ; i++ {
        yValsTemp.append(datas[i % 8])
    }

    var yVals = Array<BarChartDataEntry>();
    for var i = 0 ; i < yValsTemp.count ; i++ {
        yVals.append(BarChartDataEntry(value: (yValsTemp[i] as NSString).floatValue, xIndex: i))
    }

    var set1: BarChartDataSet = BarChartDataSet(yVals: yVals, label: "")
    var data: BarChartData = BarChartData(xVals: xVals, dataSet: set1)

I need to add one more dataSet so I have create another dataSet

    var zValsTemp = Array<String>()
    for var i = 0 ; i < count ; i++ {
        zValsTemp.append(dataSale[i % 8])
    }

    var zVals = Array<BarChartDataEntry>()
    for var i = 0 ; i < zValsTemp.count ; i++ {
        zVals.append(BarChartDataEntry(value: (zValsTemp[i] as NSString).floatValue, xIndex: i))
    }

    var set2: BarChartDataSet = BarChartDataSet(yVals: zVals, label: "")
    set2.setColor(UIColor.greenColor())

But I am not able to set Both dataSet together into final dataSet I have tried several thing
Attempt:1

    var dataSet = NSMutableArray(objects: set1,set2)

    var data: BarChartData = BarChartData(xVals: xVals, dataSet: dataSet)
    //Error:: Cannot find an initializer for type 'BarChartData' that accepts an argument list of type '(xVals: Array<String>, dataSet: NSMutableArray)'

Attempt:2

    var dataSet = NSMutableArray()
    dataSet.addObject(set1)
    dataSet.addObject(set2)

    var data: BarChartData = BarChartData(xVals: xVals, dataSet: dataSet)
    //Error:: Cannot find an initializer for type 'BarChartData' that accepts an argument list of type '(xVals: Array<String>, dataSet: NSMutableArray)'

Attempt:3

    var set = Array<BarChartDataSet>()
    set.append(set1)
    set.append(set2)

    var data: BarChartData = BarChartData(xVals: xVals, dataSet: set)
    //Error:: Cannot find an initializer for type 'BarChartData' that accepts an argument list of type '(xVals: Array<String>, dataSet: Array<BarChartDataSet>)

How can I setup both for multiple chart rendering.
Thanks

[nhjariwala]

I have resolved the problem by changing in Attempt:3

    var data: BarChartData = BarChartData(xVals: xVals, dataSet: set)

to

    var data: BarChartData = BarChartData(xVals: xVals, dataSets: set)

Simply change dataSet to dataSets helps to resolve the issue..
Thanks