Mercurial > octave
view scripts/signal/ifftshift.m @ 28886:d8318c12d903
test: remove unnecessary BIST tests in m-files checking for excessive number of inputs.
Remove BIST tests now that interpreter enforces calling function with no more than
the number of arguments defined in the function prototype.
* makeUniqueStrings.m, makeValidName.m, base64decode.m, base64encode.m,
record.m, sound.m, soundsc.m, acosd.m, acot.m, acotd.m, acoth.m, acsc.m,
acscd.m, acsch.m, asec.m, asecd.m, asech.m, asind.m, atan2d.m, atand.m, cosd.m,
cot.m, cotd.m, coth.m, csc.m, cscd.m, csch.m, sec.m, secd.m, sech.m, sind.m,
tand.m, accumdim.m, bincoeff.m, bitget.m, bitset.m, cell2mat.m, circshift.m,
cplxpair.m, cumtrapz.m, deg2rad.m, flip.m, fliplr.m, flipud.m, int2str.m,
interpft.m, logspace.m, num2str.m, postpad.m, prepad.m, rad2deg.m, rot90.m,
rotdim.m, shift.m, subsindex.m, trapz.m, rotx.m, roty.m, rotz.m, getappdata.m,
getpixelposition.m, guidata.m, isappdata.m, waitforbuttonpress.m,
__gripe_missing_component__.m, bessel.m, hsv2rgb.m, ind2gray.m, rgb2gray.m,
rgb2hsv.m, rgbplot.m, fileread.m, javachk.m, usejava.m, findstr.m,
genvarname.m, isdir.m, vectorize.m, cond.m, cross.m, duplication_matrix.m,
expm.m, isbanded.m, isdefinite.m, isdiag.m, ishermitian.m, issymmetric.m,
istril.m, istriu.m, trace.m, vech.m, vecnorm.m, cast.m, citation.m,
compare_versions.m, grabcode.m, inputname.m, isfile.m, isfolder.m, ismac.m,
ispc.m, isunix.m, list_primes.m, methods.m, news.m, open.m, run.m, swapbytes.m,
tar.m, verLessThan.m, zip.m, odeget.m, optimget.m, stemleaf.m, allchild.m,
ancestor.m, close.m, groot.m, hgsave.m, isaxes.m, isfigure.m, isgraphics.m,
ishandle.m, isprop.m, linkaxes.m, rotate.m, saveas.m, conv.m, poly.m,
polyint.m, polyreduce.m, ppval.m, roots.m, addpref.m, getpref.m, ispref.m,
rmpref.m, setpref.m, profile.m, profshow.m, powerset.m, autoreg_matrix.m,
bartlett.m, blackman.m, detrend.m, fftconv.m, fftfilt.m, fftshift.m, hamming.m,
hanning.m, ifftshift.m, sinewave.m, spectral_adf.m, spectral_xdf.m, unwrap.m,
nonzeros.m, spconvert.m, sprand.m, sprandn.m, beta.m, betainc.m, betaln.m,
cosint.m, expint.m, factorial.m, legendre.m, nchoosek.m, nthroot.m, perms.m,
pow2.m, primes.m, reallog.m, realpow.m, realsqrt.m, sinint.m, hankel.m, hilb.m,
invhilb.m, magic.m, pascal.m, toeplitz.m, vander.m, wilkinson.m, center.m,
corr.m, cov.m, discrete_cdf.m, discrete_inv.m, discrete_pdf.m, empirical_cdf.m,
empirical_inv.m, empirical_pdf.m, iqr.m, kendall.m, kurtosis.m, mad.m,
meansq.m, median.m, moment.m, prctile.m, quantile.m, range.m, run_count.m,
skewness.m, spearman.m, statistics.m, std.m, var.m, base2dec.m, bin2dec.m,
blanks.m, dec2base.m, dec2bin.m, dec2hex.m, endsWith.m, erase.m, hex2dec.m,
index.m, isletter.m, isstring.m, isstrprop.m, mat2str.m, ostrsplit.m, rindex.m,
startsWith.m, strtrunc.m, substr.m, fail.m, addtodate.m, asctime.m, ctime.m,
date.m, datestr.m, eomday.m, etime.m, is_leap_year.m, now.m:
remove unnecessary BIST tests in m-files checking for excessive number of inputs.
author | Rik <rik@octave.org> |
---|---|
date | Fri, 09 Oct 2020 13:28:53 -0700 |
parents | b09432b20a84 |
children | de5f2f9a64ff |
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######################################################################## ## ## Copyright (C) 1997-2020 The Octave Project Developers ## ## See the file COPYRIGHT.md in the top-level directory of this ## distribution or <https://octave.org/copyright/>. ## ## This file is part of Octave. ## ## Octave is free software: you can redistribute it and/or modify it ## under the terms of the GNU General Public License as published by ## the Free Software Foundation, either version 3 of the License, or ## (at your option) any later version. ## ## Octave is distributed in the hope that it will be useful, but ## WITHOUT ANY WARRANTY; without even the implied warranty of ## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the ## GNU General Public License for more details. ## ## You should have received a copy of the GNU General Public License ## along with Octave; see the file COPYING. If not, see ## <https://www.gnu.org/licenses/>. ## ######################################################################## ## -*- texinfo -*- ## @deftypefn {} {} ifftshift (@var{x}) ## @deftypefnx {} {} ifftshift (@var{x}, @var{dim}) ## Undo the action of the @code{fftshift} function. ## ## For even length @var{x}, @code{fftshift} is its own inverse, but odd lengths ## differ slightly. ## @seealso{fftshift} ## @end deftypefn function retval = ifftshift (x, dim) if (nargin != 1 && nargin != 2) print_usage (); endif if (! (isnumeric (x) || islogical (x) || ischar (x))) error ("ifftshift: X must be a vector or matrix"); endif if (nargin == 2) if (! (isscalar (dim) && dim > 0 && dim == fix (dim))) error ("ifftshift: dimension DIM must be a positive integer"); endif nd = ndims (x); sz = size (x); sz2 = floor (sz(dim) / 2); idx = repmat ({':'}, nd, 1); idx{dim} = [sz2+1:sz(dim), 1:sz2]; retval = x(idx{:}); else if (isvector (x)) xl = length (x); xx = floor (xl/2); retval = x([xx+1:xl, 1:xx]); else nd = ndims (x); sz = size (x); sz2 = floor (sz ./ 2); idx = cell (); for i = 1:nd idx{i} = [sz2(i)+1:sz(i), 1:sz2(i)]; endfor retval = x(idx{:}); endif endif endfunction %!test %! x = [0:7]; %! y = ifftshift (x); %! assert (y, [4 5 6 7 0 1 2 3]); %! assert (ifftshift (y), x); %!test %! x = [0:6]; %! y = ifftshift (x); %! assert (y, [3 4 5 6 0 1 2]); %! assert (ifftshift (y), [6 0 1 2 3 4 5]); %!test %! x = [0:7]'; %! y = ifftshift (x); %! assert (y, [4;5;6;7;0;1;2;3]); %! assert (ifftshift (y), x); %!test %! x = [0:6]'; %! y = ifftshift (x); %! assert (y, [3;4;5;6;0;1;2]); %! assert (ifftshift (y), [6;0;1;2;3;4;5]); %!test %! x = [0:3]; %! x = [x;2*x;3*x+1;4*x+1]; %! y = ifftshift (x); %! assert (y, [[7 10 1 4];[9 13 1 5];[2 3 0 1];[4 6 0 2]]); %! assert (ifftshift (y), x); %!test %! x = [0:3]; %! x = [x;2*x;3*x+1;4*x+1]; %! y = ifftshift (x,1); %! assert (y, [[1 4 7 10];[1 5 9 13];[0 1 2 3];[0 2 4 6]]); %! assert (ifftshift (y,1), x); %!test %! x = [0:3]; %! x = [x;2*x;3*x+1;4*x+1]; %! y = ifftshift (x,2); %! assert (y, [[2 3 0 1];[4 6 0 2];[7 10 1 4];[9 13 1 5]]); %! assert (ifftshift (y,2), x); %!test %! x = "efgabcd"; %! y = ifftshift (x); %! assert (y, "abcdefg"); %! assert (ifftshift (y), "defgabc"); ## Test N-dimensional input %!test <*45207> %! x = [0:3]; %! x = x + x' + reshape (x, [1 1 4]); %! y1 = [4 5 2 3; 5 6 3 4; 2 3 0 1; 3 4 1 2]; %! y = ifftshift (x); %! assert (y, reshape ([y1 + 2, y1 + 3, y1, y1 + 1], [4 4 4])); %! assert (ifftshift (y), x); ## Test input validation %!error <Invalid call> ifftshift () %!error ifftshift (0:3, -1) %!error ifftshift (0:3, 0:3)