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本帖最后由 mytomorrow 于 2019-12-10 10:08 编辑 % Q; D" d" q ~- X. r
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目录 ifft Syntax Description 1 @ a* h1 Y9 [' U% J: a% I$ M
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ifft
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Inverse fast Fourier transform . A I z. ?3 h, p" R' G& H N8 _
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Syntax
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X = ifft(Y)
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X = ifft(Y,n)
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X = ifft(Y,n,dim)
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X = ifft(___,symflag) 1 H7 l: a' S& m( A( G' v5 W. r
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Description - ^9 L- D* e& a% a& p
X = ifft(Y)
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X = ifft(Y) computes the inverse discrete Fourier transform of Y using a fast Fourier transform algorithm. X is the same size as Y. " j% [* S3 o0 D/ |
- If Y is a vector, then ifft(Y) returns the inverse transform of the vector. h- P l$ A M. a/ [$ q& P
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- If Y is a matrix, then ifft(Y) returns the inverse transform of each column of the matrix.
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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.0 E' b/ [. j9 X
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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。
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X = ifft(Y,n) returns the n-point inverse Fourier transform of Y by padding Y with trailing zeros to length n. # Z$ h$ P, I$ U' }' B6 ^
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.
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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。 ' I( |1 J5 c- Z1 V. n& p
X = ifft(___,symflag) specifies the symmetry of Y. For example, ifft(Y,'symmetric') treats Y as conjugate symmetric. 1 o6 ?2 u# O$ P0 a# m6 g
X = ifft(___,symflag)指定Y的对称性。例如,ifft(Y,'symmetric')将Y视为共轭对称。
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