折线图与核心图的绘图问题

- (NSUInteger)numberOfRecordsForPlot:(CPPlot *)plot {  
    NSUInteger recordplot;  

    if (plot.identifier == @\"Plot Error\")  
    {  
        recordplot = [HourErroroArray count];  

        recordplot--;  
    }  

    return recordplot;  
}  


- (NSNumber *)numberForPlot:(CPPlot *)plot field:(NSUInteger)fieldEnum recordIndex:(NSUInteger)index {  
    NSDecimalNumber *num = nil;  
    int eTemp1;  
    int eHour1;  
    int eMin1;  
    int eSec1;  
// Number of the X axis asked  
    if (fieldEnum == CPScatterPlotFieldX)  
    {  

    if (plot.identifier == @\"Plot Error\")  
        {  
        eHour1=[[HourErroroArray objectAtIndex:index]intValue ];  
        eMin1=[[MinErrorArray objectAtIndex:index]intValue ];  
        eSec1=[[SecErrorArray objectAtIndex:index]intValue ];  

        eTemp1=eHour1*eMin1*eSec1;  

        num = (NSDecimalNumber *)[NSDecimalNumber numberWithInt:eTemp1];  
        }  
    }  
// Number of the Y axis asked  
    else if (fieldEnum == CPScatterPlotFieldY)  
     {   
        if (plot.identifier == @\"Plot Error\")  
        {  
          num = (NSDecimalNumber *)[NSNumber numberWithInteger:index];  

        }  

     }   

    return num;  

}