dftphase
Phase angle of a discrete Fourier Transform (dFT) function.
Syntax
dftphase(vec_expr)
Argument
- vec_expr
- A valid vector expression.
Example
Curve Math Vectors | Result |
---|---|
x = dfreq(c1.x)
|
Given c1, a curve is created that is the phase angle of the discrete Fourier Transform of c1. |
Comments
The dftphase function returns the phase angle 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 dFT typically calculates the phase angle more accurately than an FFT, although it takes longer.