Down-casted Array element failed to match the target type

[nhjariwala]

Getting error on swift

    var set1: BarChartDataSet = BarChartDataSet(yVals: yVals, label: "")

while setting dataSet and its redirected to class BarChartDataSet in below function

/// calculates the maximum stacksize that occurs in the Entries array of this DataSet
private func calcStackSize(yVals: [BarChartDataEntry]!)
{
    for (var i = 0; i < yVals.count; i++)
    {
        var vals = yVals[i].values; // Error here

        if (vals != nil && vals.count > _stackSize)
        {
            _stackSize = vals.count;
        }
    }
}

[danielgindi]

So your array contains element of the wrong type...

‏בתאריך יום שני, 1 ביוני 2015, nhjariwala [email protected] כתב:

Getting error on swift

var set1: BarChartDataSet = BarChartDataSet(yVals: yVals, label: "")

while setting dataSet and its redirected to class BarChartDataSet in below
function

/// calculates the maximum stacksize that occurs in the Entries array of this DataSet
private func calcStackSize(yVals: [BarChartDataEntry]!)
{
for (var i = 0; i < yVals.count; i++)
{
var vals = yVals[i].values; // Error here

    if (vals != nil && vals.count > _stackSize)
    {
        _stackSize = vals.count;
    }
}

}

—
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#121.

[nhjariwala]

here is the code

let months =
[
    "19/03/2015", "18/03/2015", "17/03/2015", "16/03/2015"
]

    var xVals = Array<String>()
    xVals.append(months[0])
    xVals.append(months[1])
    xVals.append(months[2])
    xVals.append(months[3])

    var yVals = Array<ChartDataEntry>();
    yVals.append(ChartDataEntry(value: 10.0, xIndex: 0))
    yVals.append(ChartDataEntry(value: 20.0, xIndex: 1))
    yVals.append(ChartDataEntry(value: 30.0, xIndex: 2))
    yVals.append(ChartDataEntry(value: 15.0, xIndex: 3))

    var set1: BarChartDataSet = BarChartDataSet(yVals: yVals, label: "")

    var data: BarChartData = BarChartData(xVals: xVals, dataSet: set1)
    mBarChart.data = data
}

Can you please point out the error ?
Thnx

[danielgindi]

Do you seriously do not see how casting ChartDataEntry "down" to
BarChartDataEntry would give you such an error?

‏בתאריך יום שני, 1 ביוני 2015, nhjariwala [email protected] כתב:

here is the code

let months =
[
"19/03/2015", "18/03/2015", "17/03/2015", "16/03/2015"
]

var xVals = Array<String>()
xVals.append(months[0])
xVals.append(months[1])
xVals.append(months[2])
xVals.append(months[3])

var yVals = Array<ChartDataEntry>();
yVals.append(ChartDataEntry(value: 10.0, xIndex: 0))
yVals.append(ChartDataEntry(value: 20.0, xIndex: 1))
yVals.append(ChartDataEntry(value: 30.0, xIndex: 2))
yVals.append(ChartDataEntry(value: 15.0, xIndex: 3))

var set1: BarChartDataSet = BarChartDataSet(yVals: yVals, label: "")

var data: BarChartData = BarChartData(xVals: xVals, dataSet: set1)
mBarChart.data = data

}

Can you please point out the error ?
Thnx

—
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#121 (comment)
.

[nhjariwala]

I have tried several thing from Objective-C demo but not getting success So I have found the LineChart Samples on #29 So I have tried same thing on BarChart.

[danielgindi]

You should really read the code at the point where it expects a
BarChartDataEntry

‏בתאריך יום שני, 1 ביוני 2015, nhjariwala [email protected] כתב:

I have tried several thing from Objective-C demo but not getting success
So I have found the LineChart Samples on #29
#29 So I have tried
same thing on BarChart.

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#121 (comment)
.

[nhjariwala]

Opps extremely silly mistake I haven't figured out it .. Thanks you so much for point out this .

[sodeve19]

Hi @nhjariwala, can you say what was the mistake? Thanks

[nhjariwala]

Hi @sodeve19 ,
Earlier I was used the

    var yVals = Array<ChartDataEntry>();

but need to change DataEntry as per the chart in my case I used BarChart so

    var yVals = Array<BarChartDataEntry>();

and it was resolved the issue. Thanks ;)