strange bar behaviour in coreplot

Question

I am having a very bizarre situation with barPlot. Firstly, even when the data is null, it gives me two large barplot at indexes 1 and 2, which i can't work out where they are coming from?

And secondly, when I then call the reloadDataIfNeeded/reloadData method, it then seems to place the bars in the middle (it appears identically each time)

Ill post the code below, but it seems odd that when i don't call reload data, it gives me bars already on the barplot. - it never calls:

 -(NSNumber *)numberForPlot:(CPTPlot *)plot field:(NSUInteger)fieldEnum recordIndex:(NSUInteger)index {

it just places bars on the barplot. When i reload the data it calls that method, and despite the indexes being correct, it still misplaces the bars?

Answer 1

To solve this problem I used:

 switch ( fieldEnum ) {            
case CPTBarPlotFieldBarLocation: return [NSNumber numberWithUnsignedInteger:index]; break; 
case CPTBarPlotFieldBarTip: 
if ([plot.identifier isEqual:_nameComingThrough]) { 
return [_averageDataValuesMultiple objectAtIndex:index]; } 
else if ([plot.identifier isEqual:PAR]) { 

return [_averageOfPar objectAtIndex:index]; } 
}