Calculates the Inverse Discrete Sine Transform.
IDST(series, n)
series |
- |
An input series or array. |
n |
- |
Optional. An integer, the transform length. Defaults to |
A series or array.
idst(dst(gsin(100, 1/100, 20)))
returns a 20 Hz sine wave.
The inverse discrete sine transform is defines as:
The transform is applied to each column if the input is an array. See DST to perform the Discrete Sine Transform.