IOS charts with different X,Y values in iOS? - ios

Question

I had an iPhone application in which i have to calculate the values for x axis and y axis with some intervals as xaxis array and Yaxis array
I had fixed values.
Then i need to draw 3 line graph with their on x values and Y
values.then i need to plot scatter points on that graph itself with
different (x,y) coordinates.
I am using IOs charts library.But when giving different x values to
the line graph the X axis values are also changing, I am trying in
this way
` chartview.descriptionText = #"";
chartview.noDataTextDescription = #"You need to provide data for the chart.";
chartview.drawGridBackgroundEnabled = NO;
chartview.drawBarShadowEnabled = NO;
chartview.highlightFullBarEnabled = NO;
chartview.rightAxis.enabled=NO;
chartview.drawOrder = #[#(CombinedChartDrawOrderLine),
#(CombinedChartDrawOrderScatter),
];
ChartLegend *l = chartview.legend;
l.enabled = false;
//chartview.xAxisRenderer
ChartYAxis *leftAxis = chartview.leftAxis;
leftAxis.axisLineWidth=2.0f;
leftAxis.axisLineColor =[UIColor whiteColor];
leftAxis.drawGridLinesEnabled = YES;
leftAxis.gridColor=[UIColor whiteColor];
leftAxis.gridLineDashLengths = #[#5.f, #5.f];
NSLog(#"%#",yaxispoints);
NSLog(#"%f",[[yaxispoints firstObject] floatValue]);
NSLog(#"%f",[[yaxispoints lastObject] floatValue]);
leftAxis.axisMinimum = [[yaxispoints firstObject] floatValue]; // this replaces startAtZero = YES
leftAxis.axisMaximum = [[yaxispoints lastObject] floatValue];
leftAxis.labelCount = [yaxispoints count];
leftAxis.spaceTop = 40.0;
leftAxis.labelTextColor=[UIColor whiteColor];
ChartXAxis *xAxis = chartview.xAxis;
[xAxis setDrawAxisLineEnabled:YES];
xAxis.axisLineWidth=2.0f;
xAxis.granularityEnabled=YES;
xAxis.axisLineColor =[UIColor whiteColor];
xAxis.labelPosition = XAxisLabelPositionBottom;
xAxis.axisMinimum = [[months firstObject] floatValue]; // this replaces startAtZero = YES
xAxis.axisMaximum = [[months lastObject] floatValue];
xAxis.labelCount = [months count];
xAxis.forceLabelsEnabled=YES;
xAxis.drawGridLinesEnabled = YES;
xAxis.gridColor=[UIColor whiteColor];
xAxis.gridLineDashLengths = #[#5.f, #5.f];
xAxis.valueFormatter = self;
xAxis.labelTextColor=[UIColor whiteColor];
[self updateChartData];
[chartview animateWithXAxisDuration:1.5 yAxisDuration:1.5];`
- (void)updateChartData
{
[self setChartData];
}
- (void)setChartData
{
CombinedChartData *data = [[CombinedChartData alloc] init];
data.lineData = [self generateLineData];
data.scatterData = [self generateScatterData];
chartview.xAxis.axisMaximum = data.xMax + 5.0;
chartview.data = data;
}
- (LineChartData *)generateLineData
{
LineChartData *d = [[LineChartData alloc] init];
NSMutableArray *entries = [[NSMutableArray alloc] init];
NSArray *scxaxis = #[#"55.987", #"75.976", #"85.976"
];
NSArray *scyaxis = #[#"85.987", #"25.976", #"95.976"
];
for (int index = 0; index < [scxaxis count]; index++)
{
[entries addObject:[[ChartDataEntry alloc] initWithX:[[scxaxis objectAtIndex:index] doubleValue] y:[[scyaxis objectAtIndex:index] doubleValue]]];
}
LineChartDataSet *set = [[LineChartDataSet alloc] initWithValues:entries label:#"Line DataSet"];
[set setColor:[UIColor greenColor]];
set.lineWidth = 3.0;
// [set setCircleColor:[UIColor redColor]];
//set.circleRadius = 0.0;
// set.circleHoleRadius = 0.0;
set .drawCirclesEnabled=NO;
set.fillColor = [UIColor clearColor];
set.mode = LineChartModeLinear;
set.drawValuesEnabled = NO;
set.valueFont = [UIFont systemFontOfSize:14.f];
set.valueTextColor = [UIColor whiteColor];
set.axisDependency = AxisDependencyLeft;
[d addDataSet:set];
return d;
}
I am trying like this,But when giving different x values to each data set in line graph the x axis is completely going wrong according to it. i want the x axis to be fetched from different array and x,y points of line graph to be from different array, Can anybody help me on achieving this ?

Answer 1

Maybe the problem is
chartview.xAxis.axisMaximum = data.xMax + 5.0;
Cause you are using CombinedChartData,if the you should call calcMinMax() at first.
And accord to your code ,the x axis should be in [0,90.976].What your graph shows?