[BUG] getPeaks gives error when calculating 1st polynomial order

[fslaborg]

[BUG] getPeaks gives error when calculating 1st polynomial order

[bvenn]

The reason for the error is, that the pseudoinvers matrix b has just 2 rows and by setting the derivative to 2 you aim to access the non existing row number 3.

let deriv =2
let m = (Algebra.LinearAlgebraManaged.pseudoInvers b).Row(deriv) * ((float(rate)**float(deriv)) * SpecialFunctions.Factorial.factorial(deriv))

Explanation of this behaviour:
A first order polynomial takes the form f(x)=ax+b. The first derivative is f'(x)=a and consequently the second derivative is f''(x)=0, and therefore cannot be accessed.
I do not think that it is a good idea (and invalid), to use the savitzky golay filter with these parameters.

[bvenn]

closed by a3c5a6d