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#!N
#!N #!Rdft
DFT #!N #!N Category #!N #!N #!Lcattrn,dxall763 h Transformation #!EL #!N #!N Function #!N
#!N Computes a discrete Fourier transform. #!N #!N Syntax #!CForestGreen #!N
#!N #!F-adobe-courier-bold-r-normal--18* #!N #!F-adobe-times-bold-r-normal--18* output #!EF = DFT( #!F-adobe-times-bold-r-normal--18* input #!EF
, #!F-adobe-times-bold-r-normal--18* direction #!EF , #!F-adobe-times-bold-r-normal--18* center #!EF ); #!EF #!N
#!N #!EC #!N #!N Inputs #!T,1,91,276,461,646 #!F-adobe-times-medium-r-normal--14* #!F-adobe-times-bold-r-normal--18* #!N TAB Name
TAB Type TAB Default TAB Description #!EF #!N TAB input TAB
field TAB none TAB field to be transformed #!N TAB direction
TAB string TAB "forward" TAB direction of the transform #!N TAB
center TAB flag TAB 0 TAB center the result of the
transform #!N TAB - TAB - TAB - TAB #!EF #!N
#!N Outputs #!T,1,161,321,646 #!F-adobe-times-medium-r-normal--14* #!F-adobe-times-bold-r-normal--18* #!N TAB Name TAB Type TAB
Description #!EF #!N TAB output TAB field TAB transformed data #!N
TAB - TAB - TAB #!EF #!N #!N Functional Details #!N
#!N This module computes the discrete Fourier transform of a 2-
or 3-dimensional regular data set. #!N #!I0 #!N #!N #!I0 #!N
#!F-adobe-times-bold-r-normal--18* #!F-adobe-times-bold-r-normal--18* input #!EF #!EF #!I50 #!N specifies the field to
be transformed. #!N #!I0 #!N #!F-adobe-times-bold-r-normal--18* #!F-adobe-times-bold-r-normal--18* direction #!EF #!EF #!I50
#!N is one of the following: "forward," "inverse," or "backward" (the
last two are interchangeable). #!N #!I0 #!N #!F-adobe-times-bold-r-normal--18* #!F-adobe-times-bold-r-normal--18* center #!EF
#!EF #!I50 #!N specifies whether zero frequency should be placed at
the center of the transformed field or at the origin of
the positions array. #!I0 #!N #!N #!N #!N Components #!N #!N
All scalar components of #!F-adobe-times-bold-r-normal--18* input #!EF are individually Fourier-transformed and
output as complex float. All other input components are propagated to
the output. Thus a float 2-vector input produces a complex 2-vector
output. #!N #!N Example Visual Programs #!CForestGreen #!N #!N #!F-adobe-courier-bold-r-normal--18* #!N
FFT.net #!EF #!N #!N #!EC #!N #!N See Also #!N #!N
#!Lfft,dxall846 h FFT #!EL , #!Lfilter,dxall849 h Filter #!EL , #!Lmorph,dxall896 h Morph #!EL #!N #!N #!N #!F-adobe-times-medium-i-normal--18* Next Topic
#!EF #!N #!N #!Ldxlinpt,dxall802 h DXLInput #!EL #!N #!F-adobe-times-medium-i-normal--18* #!N
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