dftmag
Magnitude of a discrete Fourier Transform (dFT) function.
Syntax
dftmag(vec_expr)
Argument
- vec_expr
- A valid vector expression.
Examples
| Curve Math Vectors | Result |
|---|---|
x = dfreq(c1.x)
|
Given c1, a curve is created that is the amplitude spectrum of the discrete Fourier Transform of c1. |
| Curve Math Vectors | Result |
|---|---|
fold(dfreq(c1.x))/2
|
Given c1, normalize the output by dividing the results by the number of points. |
Comments
The dftmag function returns the magnitude of a discrete Fourier Transform (dFT). The dFT is complex-valued and used to map time-domain data into the frequency domain. vec_expr_1 is assumed to be evenly sampled. The resultant vector has a number of elements equal to the number of elements in vec_expr.
The result (amplitude) of dftmag is dependent on the frequency/sampling.