Mercurial > octave
diff src/DLD-FUNCTIONS/fft2.cc @ 7814:87865ed7405f
Second set of single precision test code and fix of resulting bugs
| author | David Bateman <dbateman@free.fr> |
|---|---|
| date | Mon, 02 Jun 2008 16:57:45 +0200 |
| parents | 82be108cc558 |
| children | 4976f66d469b |
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--- a/src/DLD-FUNCTIONS/fft2.cc Thu May 22 22:00:26 2008 +0200 +++ b/src/DLD-FUNCTIONS/fft2.cc Mon Jun 02 16:57:45 2008 +0200 @@ -106,7 +106,10 @@ dims (1) = n_cols; if (dims.all_zero () || n_rows == 0 || n_cols == 0) - return octave_value (Matrix ()); + if (arg.is_single_type ()) + return octave_value (FloatMatrix ()); + else + return octave_value (Matrix ()); if (arg.is_single_type ()) { @@ -200,6 +203,93 @@ } /* + +%% Author: David Billinghurst (David.Billinghurst@riotinto.com.au) +%% Comalco Research and Technology +%% 02 May 2000 +%!test +%! M=16; +%! N=8; +%! +%! m=5; +%! n=3; +%! +%! x = 2*pi*(0:1:M-1)/M; +%! y = 2*pi*(0:1:N-1)/N; +%! sx = cos(m*x); +%! sy = sin(n*y); +%! s=kron(sx',sy); +%! S = fft2(s); +%! answer = kron(fft(sx)',fft(sy)); +%! assert(S, answer, 4*M*N*eps); + +%% Author: David Billinghurst (David.Billinghurst@riotinto.com.au) +%% Comalco Research and Technology +%% 02 May 2000 +%!test +%! M=12; +%! N=7; +%! +%! m=3; +%! n=2; +%! +%! x = 2*pi*(0:1:M-1)/M; +%! y = 2*pi*(0:1:N-1)/N; +%! +%! sx = cos(m*x); +%! sy = cos(n*y); +%! +%! S = kron(fft(sx)',fft(sy)); +%! answer=kron(sx',sy); +%! s = ifft2(S); +%! +%! assert(s, answer, 30*eps); + + +%% Author: David Billinghurst (David.Billinghurst@riotinto.com.au) +%% Comalco Research and Technology +%% 02 May 2000 +%!test +%! M=16; +%! N=8; +%! +%! m=5; +%! n=3; +%! +%! x = 2*pi*(0:1:M-1)/M; +%! y = 2*pi*(0:1:N-1)/N; +%! sx = single(cos(m*x)); +%! sy = single(sin(n*y)); +%! s=kron(sx',sy); +%! S = fft2(s); +%! answer = kron(fft(sx)',fft(sy)); +%! assert(S, answer, 4*M*N*eps('single')); + +%% Author: David Billinghurst (David.Billinghurst@riotinto.com.au) +%% Comalco Research and Technology +%% 02 May 2000 +%!test +%! M=12; +%! N=7; +%! +%! m=3; +%! n=2; +%! +%! x = single(2*pi*(0:1:M-1)/M); +%! y = single(2*pi*(0:1:N-1)/N); +%! +%! sx = cos(m*x); +%! sy = cos(n*y); +%! +%! S = kron(fft(sx)',fft(sy)); +%! answer=kron(sx',sy); +%! s = ifft2(S); +%! +%! assert(s, answer, 30*eps('single')); + +*/ + +/* ;;; Local Variables: *** ;;; mode: C++ *** ;;; End: ***