sgolay
Savitsky-Golay filter coefficients.
Syntax
f=sgolay(p,n)
f=sgolay(p,n)
f=sgolay(p,n,m)
f=sgolay(p,n,m,ts)
Inputs
- p
- The polynomial order.
- n
- The number of points in each polynomial fit.
- m
- The derivative of the fitted polynomials to compute.
- ts
- The sampling interval.
Outputs
- f
- The filter coefficients.
Example
Compute coefficients for a fourth order filter fitted to groups of seven points for approximation of first derivatives, with unit time samples.
f = sgolay(4,7,1,1)f = [Matrix] 7 x 7
-1.59452e+00 1.82504e+00 5.42569e-01 -8.63636e-01 -4.97114e-01 8.56782e-01 -2.69120e-01
-4.12698e-01 -9.92063e-02 2.69841e-01 3.33333e-01 6.34921e-02 -2.34127e-01 7.93651e-02
5.69986e-02 -5.84055e-01 -1.80375e-02 4.39394e-01 2.75613e-01 -2.18975e-01 4.90620e-02
8.73016e-02 -2.65873e-01 -2.30159e-01 2.74662e-16 2.30159e-01 2.65873e-01 -8.73016e-02
-4.90620e-02 2.18975e-01 -2.75613e-01 -4.39394e-01 1.80375e-02 5.84055e-01 -5.69986e-02
-7.93651e-02 2.34127e-01 -6.34921e-02 -3.33333e-01 -2.69841e-01 9.92063e-02 4.12698e-01
2.69120e-01 -8.56782e-01 4.97114e-01 8.63636e-01 -5.42569e-01 -1.82504e+00 1.59452e+00