fft2two-dimension fast Fourier
transform
Syntaxy=fft2(x)
y=fft2(x,n,m)
Argumentsxa vector/matrix/array (Real or Complex)ya vector/matrix/array (Real or Complex)minteger, number of rows.ninteger, number of columns.Descriptiony=fft2(x)y and x have the same size
y=fft2(x,m,n): If m (respectively
n) is less than the rows number (respectively columns) of
x then the x rows number (resp. columns) is
truncated, else if m (resp. n) is more than the rows number
(resp. columns) of x then x rows are completed
by zero (resp. columns) .
if x is a matrix then y is a matrix, if
x is a hypermatrix then y is a hypermatrix, with
the size of the first dimension of y is equal to
m, the size of the second dimension of y is
equal to n, the size of the ith dimension of y
(for i>2, case hypermatrix) equal to the size of the ith dimension of
x. (i.e size(y,1)=m, size(y,2)=n and size(y,i)=size(x,i) for
i>2)
ExamplesSee Also
fft