Hello

I am trying to generate the 1st derivative of a signal vector X using the Savitzky-Golay-Filter method. With the use of function "[B,G]=sgolay(k,f)", a matrix G can be loaded containing differentiators of any orders which can be used as FIR b coefficients.

The problem is that there are no filter coefficients in G for the startup- and terminal-transient of X. How can I get them, or is there an other option to get the derivative?