Add annotation for single plot in CPTXYgraph

[GoogleCodeExporter]

Hello,
I try to add annotation for a single point in my scatter plot graph. 
Coordinates of this point are calculate inside an own method and I apply a 
reloadData to refresh the graph.
So I add this code in numberForPlot method to create the annotation:

    CPTMutableTextStyle *textStyle = [[CPTMutableTextStyle alloc] init];
    textStyle.color = [CPTColor whiteColor];
    textStyle.fontName = @"Helvetica-Bold";
    textStyle.fontSize = 11.0f;
    CPTPlotSpaceAnnotation *annotZFW;
    CPTTextLayer *textAnnotZFW=[[CPTTextLayer alloc]initWithFrame:CGRectMake(0,0,30,10)];
    textAnnotZFW.textStyle=textStyle;
    textAnnotZFW.text=@"ZFW";
    annotZFW.contentLayer=textAnnotZFW;
    NSArray *anchorpoint=[NSArray arrayWithObjects:iZFW,mZFW,nil];
    annotZFW=[[CPTPlotSpaceAnnotation alloc]initWithPlotSpace:graph.defaultPlotSpace anchorPlotPoint:anchorpoint];
    [graph.plotAreaFrame.plotArea addAnnotation:annotZFW];

but there is no annotation for my single plot.
Can you help me and explain what is the way to do so?

Thanks,

Original issue reported on code.google.com by famille....@gmail.com on 2 Apr 2014 at 4:36

[GoogleCodeExporter]

What are iZFW and mZFW? Make sure they represent numbers within the xRange and 
yRange of the plot space.

Please ask questions like this on the discussion board 
(https://groups.google.com/forum/#!forum/coreplot-discuss).

This issue tracker is closed--new issues should be posted on Github 
(https://github.com/core-plot/core-plot/issues).

Original comment by eskr...@mac.com on 3 Apr 2014 at 12:32

• Changed state: Invalid