ydiff

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Calculates the differentiation (differnce quotients) of the vector y = f(x).


Usage 1
ydiff(yvector {, dxscalar=1})
Result 1
The result is the vector r with nrow(y)-1elements.
r[i]=(y[i+1]-y[i])/dx; with: i=0..nrow(y)-2

Usage 2
ydiff(yvector, xvector)
Result 2
The result is the vector r with nrow(y)-1elements.
r[i]=(y[i+1]-y[i])/(x[i+1]-x[i]); with: i=0..nrow(y)-2

Usage 3
ydiff(knumber, xvector)
Result 3
The result is the vector r with nrow(y)-1elements. This version is normally used for signal differentiation (with: 0 ≤ knumber &le 1).
r[i]=x[i+1]-k.y[i]; with: i=0..nrow(y)-2
See also
yint

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