Automatic selection of chart axis min and max

Hi Jason,

I have found that in some cases the automatic selection of chart axis minimum and maximum values seems a bit screwy. For example, I made a bar char with the following y values:

        private double[] yValues2 = new double[]
    {
        -0.1,
        -0.05,
        -0.01,
        0.0,
        0.01,
        0.05,
        .1
    };

The chart selects the y-axis minimum as -2.0 and the maximum 1.0, which results in tiny little bars. It seems that for small data values the chart tends like this -2 to +1 range for some reason, and I think this happens for other series types as well. I realize that I can manually set the range myself, but I'd rather not have to in normal circumstances. I also see that there is a possibly relevant property called YAxisDataBuffer, but I am not sure from the description. Any advice?

Peter

Hello Peter

Yes, the YAxisDataBuffer is related. Sorry for the poor description. This value is the desired spacing between the largest/smallest data points and the calculated limits of the Y axis. So in your case, you can set this to be 0.05 which will produce a good result. Unfortunately this property does not set itself automatically based on the data, so you'll need to set it manually. If the data in your chart can change from being all small data to larger data, you could either update the YAxisDataBuffer property accordingly, or just always leave it as 0.05 which just means there will be a smaller gap between large data and the Y axis limits.

-Jason