2008/9/30 bevan <[EMAIL PROTECTED]>: > Hello, > > I have some XY data. I would like to generate the equations for an upper and > lower envelope that excludes a percentage of the data points. > > I would like to define the slope of the envelope line (say 3) and then have my > code find the intercept that fits my requirements (say 5% of data below the > lower envelope). This would then give me the equation and I could plot the > upper and lower envelopes. > > > I hope this makes sense. Thanks for any help.
For this particular problem - where you know the slope - it's not too hard. If the slope is b, and your points are x and y, compute y-b*x, then sort that array, and choose the 5th and 95th percentile values. Anne _______________________________________________ Numpy-discussion mailing list Numpy-discussion@scipy.org http://projects.scipy.org/mailman/listinfo/numpy-discussion
