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本帖最后由 mytomorrow 于 2019-12-10 10:08 编辑
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 目录 ifft Syntax Description $ _0 B* e( s3 m
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 ifft 9 Y9 ?) P7 t1 [1 X/ S1 m
 Inverse fast Fourier transform   q* _) u' y1 I" i3 C* G
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 Syntax % R0 l" ]/ E* v2 s& @
 X = ifft(Y) 9 f* |1 N" Y% g- R
 X = ifft(Y,n) \" p) y8 F- p  h
 X = ifft(Y,n,dim) 5 ~5 n5 ^7 W! k9 i" U
 X = ifft(___,symflag) 4 t' Z5 R+ S$ a! K
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 Description 5 w* t: V+ u) A9 m3 `  S
 X = ifft(Y) 6 I1 ]/ z% C+ c0 s+ i
 X = ifft(Y) computes the inverse discrete Fourier transform of Y using a fast Fourier transform algorithm. X is the same size as Y. 2 B  Q: _. u! K' W: ?
 If Y is a vector, then ifft(Y) returns the inverse transform of the vector.+ c* p" O$ L) G6 I
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 If Y is a matrix, then ifft(Y) returns the inverse transform of each column of the matrix.9 U) \0 O8 n2 I
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 If Y is a multidimensional array, then ifft(Y) treats the values along the first dimension whose size does not equal 1 as vectors and returns the inverse transform of each vector.* ]: S- ~  \. a1 Y* o
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 本想翻译一下的,但是手册里面的英文描述的太清晰了,单词也很简单,所以就这样直接看吧。 & P; c' a9 @( q; ]7 n
 X = ifft(Y,n) returns the n-point inverse Fourier transform of Y by padding Y with trailing zeros to length n.   u, w% x  U; ]# p) Q
 X = ifft(Y,n,dim) returns the inverse Fourier transform along the dimension dim. For example, if Y is a matrix, then ifft(Y,n,2) returns the n-point inverse transform of each row. 6 N5 H4 O! l% Q3 O9 \( D+ g. r
 X = ifft(Y,n,dim)沿维度dim返回逆傅立叶变换。 例如,如果Y是矩阵,则ifft(Y,n,2)返回每行的n点逆变换。 ' F8 a  {. R$ d& N1 o
 X = ifft(___,symflag) specifies the symmetry of Y. For example, ifft(Y,'symmetric') treats Y as conjugate symmetric. + F) D8 p4 U& ?2 P" T, J. y* i
 X = ifft(___,symflag)指定Y的对称性。例如,ifft(Y,'symmetric')将Y视为共轭对称。 , T' o/ h4 B. ]- \- O5 x
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