Spatial FFT
Create a spatial FFT dataset.
Syntax
model.result().dataset().create(<dtag>,"SpatialFFT");
model.result().dataset(<dtag>).set(property,<value>);
Description
model.result().dataset().create(<dtag>,"SpatialFFT") creates a spatial FFT dataset.
Spatial FFT datasets compute the spatial Fourier transform of a variable or expression.
The following properties are available:
Table 7-141: Valid Property/Value Pairs for Spatial FFT Datasets.
Name
Value
Default
Description
backward
true | false
true
Use a negative frequency (changed sign).
data
none | dataset name
First compatible dataset
The dataset this feature refers to.
domain
frequency | index
frequency
Axes values corresponding to the spatial frequencies or as the 0-based DFT indices.
gridres
auto | manual
automatic
Create the spatial grid resolution automatically or by entering the resolution manually.
fxvar
String
sfft1fx (for an sfft1 dataset)
Fourier space x component variable name.
fyvar
String
sfft1fy (for an sfft1 dataset)
Fourier space y component variable name.
fzvar
String
sfft1fz (for an sfft1 dataset)
Fourier space z component variable name.
layout
normal | periodic | padding
automatic
Use a normal layout, a periodic layout, or use zero padding,
maskdc
true | false
true
Mask the DC part.
padx
integer
10
The zero padding in the x direction if layout is set to padding.
pady
integer
10
The zero padding in the y direction if layout is set to padding.
padz
integer
10
The zero padding in the z direction if layout is set to padding.
refine
nonnegative integer
1
The element refinement to use, if resolution is set to manual.
resolution
norefine | coarse | normal | fine | finer | extrafine | custom
normal
Controls the resolution. A finer setting results in a higher resolution by modifying the internally computed default refinement. Use custom to enter your own refinement in the refine property.
sampresx
integer
10
The sampling resolution in the x direction if gridres is set to manual.
sampresy
integer
10
The sampling resolution in the y direction if gridres is set to manual.
sampresz
integer
10
The sampling resolution in the z direction if gridres is set to manual.