it will crash when i insert data on RadarChart

[canyu9512]

example：
RadarChartDataEntry *entry1 = [[RadarChartDataEntry alloc] initWithValue:[@"0.334" floatValue]]; RadarChartDataEntry *entry2 = [[RadarChartDataEntry alloc] initWithValue:[@"0.330" floatValue]]; RadarChartDataEntry *entry3 = [[RadarChartDataEntry alloc] initWithValue:[@"0.330" floatValue]]; [entries1 addObject:entry1]; [entries1 addObject:entry2]; [entries1 addObject:entry3];

sometime when i insert some data，it will crash at YAxisRendererRadarChart.swift line 137。
fatal error: Double value cannot be converted to Int because it is either infinite or NaN

[liuxuan30]

first format your code as readable code.
What data you insert and causes the NaN? Can you reproduce it with ChartsDemo?

[canyu9512]

NSMutableArray *entries1 = [[NSMutableArray alloc] init];
RadarChartDataEntry *entry1 = [[RadarChartDataEntry alloc] initWithValue:[@"0.334" floatValue]];
RadarChartDataEntry *entry2 = [[RadarChartDataEntry alloc] initWithValue:[@"0.330" floatValue]];
RadarChartDataEntry *entry3 = [[RadarChartDataEntry alloc] initWithValue:[@"0.330" floatValue]];
[entries1 addObject:entry1];
[entries1 addObject:entry2];
[entries1 addObject:entry3];
RadarChartDataSet *set1 = [[RadarChartDataSet alloc] initWithValues:entries1 label:@"Last Week"];
When i insert data such as [0.334, 0.330, 0.330] , this is just one of them, there are some other data can result in collapse, this will reappear in the ChartsDemo.
The code above is my test on ChartsDemo.

[liuxuan30]

You totally missed the point how it crashes, and how you insert the data.
I have no problem adding new entry into radar chart in ChartsDemo:

    double mult = 80;
    double min = 20;
    RadarChartDataEntry *entry1 = [[RadarChartDataEntry alloc] initWithValue:(arc4random_uniform(mult) + min)];
    [_chartView.data.dataSets.firstObject addEntry:entry1];
    [_chartView.data notifyDataChanged];
    [_chartView notifyDataSetChanged];

If it still crashes on your side, make sure you post a full code sample so I can paste into ChartsDemo and reproduce, then ropen this thread.

[mattgallivan]

The following causes a crash of the same type as the previous poster:

class ExampleRadarChartView: RadarChartView {

    public override init(frame: CGRect) {
        super.init(frame: frame)
        configure()
        let entries = [
            RadarChartDataEntry(value: 0.7),
            RadarChartDataEntry(value: 0.36),
            RadarChartDataEntry(value: 0.4),
            RadarChartDataEntry(value: 0.8),
            RadarChartDataEntry(value: 0.6),
            RadarChartDataEntry(value: 0.4),
        ]
        let dataSet = RadarChartDataSet(values: entries, label: nil)
        dataSet.drawFilledEnabled = true
        dataSet.drawValuesEnabled = false
        data = RadarChartData(dataSet: dataSet)
    }

    public required init(coder aDecoder: NSCoder) {
        fatalError("")
    }

    private func configure() {
        chartDescription = nil
        drawMarkers = false
        drawWeb = false
        isUserInteractionEnabled = false
        xAxis.drawAxisLineEnabled = false
        xAxis.drawLabelsEnabled = false
        xAxis.drawGridLinesEnabled = false
        yAxis.drawAxisLineEnabled = false
        yAxis.drawLabelsEnabled = false
        yAxis.drawGridLinesEnabled = false
    }
}

[mattgallivan]

It would appear that this is because interval is being set to 0. That seems to happen here:

if intervalSigDigit > 5
{
    // Use one order of magnitude higher, to avoid intervals like 0.9 or
    // 90
    interval = floor(10 * intervalMagnitude)
}

EDIT:

I believe this is a result of assuming that intervalMagnitude >= 0.1. When it is less than 0.1, the interval becomes zero which results in an incorrect log10 call at the point of error.

[liuxuan30]

I need to know why interval is 0? Could you provide the data when it's calculated as 0?

[mattgallivan]

I believe that the data in my example causes the crash.

[royherma]

App freezing when I put data into my radar view. Even testing out simple values causes issues. The self.radarChart.data is the problem, as when i comment it out, the graph displays fine, just with "no data label" displayed.

Any ideas?

let cde1 = ChartDataEntry(value: 10.0, xIndex: 0)
let cde2 = ChartDataEntry(value: 15.0, xIndex: 1)
self.radarChart.data = RadarChartData(xVals: ["a","b"], dataSet: RadarChartDataSet(yVals: [cde1,cde2]))