Merge pull request #2 from Brijeshcr/master

Brijesh functions added

1 files changed, 45 insertions, 0 deletions

diff --git a/macros/ifft2.sci b/macros/ifft2.sci
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+++ b/macros/ifft2.sci
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+function res = ifft2 (A, m, n)
+//Calculates the inverse two-dimensional discrete Fourier transform of A using a Fast Fourier Transform algorithm.
+//Calling Sequence
+//ifft2 (A, m, n)
+//ifft2 (A)
+//Parameters 
+//A: input matrix
+//m: number of rows of A to be used
+//n: number of columns of A to be used
+//Description
+//This is an Octave function.
+//It performs inverse two-dimensional FFT on the matrix A. m and n may be used specify the number of rows and columns of A to use. If either of these is larger than the size of A, A is resized and padded with zeros.
+//If A is a multi-dimensional matrix, each two-dimensional sub-matrix of A is treated separately.
+//Examples
+//x = [1 2 3; 4 5 6; 7 8 9]
+//m = 4
+//n = 4
+//ifft2 (A, m, n)
+//ans =
+//
+//   2.81250 + 0.00000i  -0.37500 + 0.93750i   0.93750 + 0.00000i  -0.37500 - 0.93750i
+//  -1.12500 + 0.93750i  -0.31250 - 0.50000i  -0.37500 + 0.31250i   0.31250 + 0.25000i
+//   0.93750 + 0.00000i  -0.12500 + 0.31250i   0.31250 + 0.00000i  -0.12500 - 0.31250i
+//  -1.12500 - 0.93750i   0.31250 - 0.25000i  -0.37500 - 0.31250i  -0.31250 + 0.50000i
+
+funcprot(0);
+lhs = argn(1)
+rhs = argn(2)
+if (rhs < 1 | rhs > 3)
+error("Wrong number of input arguments.")
+end
+
+select(rhs)
+	
+	case 1 then
+	res = callOctave("ifft2", A)
+
+	case 2 then
+	error("Wrong number of input arguments.")
+
+	case 3 then
+	res = callOctave("ifft2", A, m, n)
+
+	end
+endfunction