$DFTallField

Format

$DFTallField
 ifoutput
 Intype    fi    ff    N          // ifoutput, Intype, and N are integers, the others are floating points.

This function allows the program to calculate the field of certain frequencies by discrete Fourier transform (DFT).

ifoutput: 1 means the program outputs the DFT results at output-step. 0 means it outputs results only after time-step.
Intype: 1 means f_i and f_f are frequencies; on the other hand, 2 means they are wavelengths.
f_i: initial frequency or wavelength.
f_f: final frequency or wavelength.
N: the number of frequencies between f_i and f_f.

Example

$DFTallField
 1
 2    400e-9    400e-9    1

Related commands

$DFTallField, $CalGeneration