Problem:
I am plotting a time series. I don't know apriori the minimum & maximum values. I want to plot it for the last 5 seconds of data. I want the plot to automaticaly rescale itself to best fit the data for the past five seconds. However, I don't want the rescaling to be jerky (as one would get by constantly resetting the min & max) -- when it does rescale, I want the rescaling to be smooth.
Are ther开发者_StackOverflowe any existing algorithms for handling this?
Formally:
I have a function
float sample();
that you can call multiple times. I want you to constantly, in real time, plot the last 5 * 60 values to me, with the chart nicely scaled. I want the chart to automatically rescale; but not in a "jerky" way.
Thanks!
You could try something like
float currentScale = 0;
float adjustSpeed = .3f;
void iterate() {
float targetScale = sample();
currentScale += adjustSpeed * (targetScale - currentScale);
}
And lower the adjustSpeed if it's too jerky.
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