ydiff

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

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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

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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

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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 ≤ k_number &le 1).

r[i]=x[i+1]-k.y[i]; with: i=0..nrow(y)-2

See also

yint

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