Mercurial > octave
view liboctave/external/lapack-xtra/crsf2csf.f @ 27985:9f9ac219896d
maint: Remove remaining "Author:" instances from code base.
* __ftp__.cc, load-save.cc, urlwrite.cc, xnorm.cc, xnorm.h, cconv2.f,
cdotc3.f, cmatm3.f, csconv2.f, dconv2.f, ddot3.f, dmatm3.f, sconv2.f, sdot3.f,
smatm3.f, zconv2.f, zdconv2.f, zdotc3.f, zmatm3.f, crsf2csf.f, zrsf2csf.f,
oct-norm.cc, oct-norm.h, lin2mu.m, mu2lin.m, bincoeff.m, blkdiag.m, deal.m,
gradient.m, interpft.m, nextpow2.m, postpad.m, prepad.m, repmat.m, shift.m,
xor.m, griddata.m, rotx.m, roty.m, rotz.m, voronoin.m, getappdata.m,
isappdata.m, rmappdata.m, setappdata.m, colormap.m, gray.m, gray2ind.m,
im2double.m, image.m, imagesc.m, imread.m, imshow.m, ind2gray.m, ind2rgb.m,
ocean.m, __imread__.m, rgb2ind.m, javachk.m, ClassHelper.java, usejava.m,
findstr.m, commutation_matrix.m, cross.m, gls.m, housh.m, isdefinite.m,
ishermitian.m, issymmetric.m, logm.m, null.m, ols.m, orth.m, qzhess.m, rref.m,
dos.m, nargoutchk.m, orderfields.m, parseparams.m, __w2mpth__.m, unix.m,
untar.m, unzip.m, expand_rel_paths.m, make_rel_paths.m, daspect.m, orient.m,
pbaspect.m, rticks.m, thetaticks.m, xticklabels.m, xticks.m, yticklabels.m,
yticks.m, zticklabels.m, zticks.m, comet.m, contourf.m, plot3.m, cla.m,
copyobj.m, findfigs.m, hdl2struct.m, linkaxes.m, __ghostscript__.m,
__gnuplot_get_var__.m, __gnuplot_has_feature__.m, __gnuplot_has_terminal__.m,
__gnuplot_open_stream__.m, __gnuplot_print__.m, struct2hdl.m, subplot.m,
compan.m, conv.m, deconv.m, mpoles.m, poly.m, polyder.m, polyfit.m, polyint.m,
polyout.m, polyreduce.m, polyval.m, polyvalm.m, residue.m, roots.m, ismember.m,
__parse_movargs__.m, detrend.m, fftconv.m, fftfilt.m, fftshift.m, filter2.m,
movfun.m, movslice.m, ichol.m, pcg.m, beta.m, ellipke.m, lcm.m, nchoosek.m,
pow2.m, primes.m, pascal.m, rosser.m, wilkinson.m, corr.m, kurtosis.m,
skewness.m, base2dec.m, bin2dec.m, blanks.m, deblank.m, dec2base.m, dec2bin.m,
dec2hex.m, hex2dec.m, index.m, rindex.m, strjoin.m, substr.m, untabify.m,
calendar.m, datestr.m, eomday.m, now.m, weekday.m:
Remove remaining "Author:" instances from code base.
author | Rik <rik@octave.org> |
---|---|
date | Tue, 21 Jan 2020 14:35:03 -0800 |
parents | bd51beb6205e |
children | 0a5b15007766 |
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c Copyright (C) 2010-2020 The Octave Project Developers c c See the file COPYRIGHT.md in the top-level directory of this c distribution or <https://octave.org/copyright/>. c c This file is part of Octave. c c Octave is free software: you can redistribute it and/or modify it c under the terms of the GNU General Public License as published by c the Free Software Foundation, either version 3 of the License, or c (at your option) any later version. c c Octave is distributed in the hope that it will be useful, but c WITHOUT ANY WARRANTY; without even the implied warranty of c MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the c GNU General Public License for more details. c c You should have received a copy of the GNU General Public License c along with Octave; see the file COPYING. If not, see c <https://www.gnu.org/licenses/>. c subroutine crsf2csf(n,t,u,c,s) integer n complex t(n,n),u(n,n) real c(n-1),s(n-1) real x,y,z integer j do j = 1,n-1 c(j) = 1 end do j = 1 do while (j < n) c apply previous rotations to rows call crcrot1(j,t(1,j),c,s) y = t(j+1,j) if (y /= 0) then c 2x2 block, form Givens rotation [c, i*s; i*s, c] z = t(j,j+1) c(j) = sqrt(z/(z-y)) s(j) = sqrt(y/(y-z)) c apply new rotation to t(j:j+1,j) call crcrot1(2,t(j,j),c(j),s(j)) c apply all rotations to t(1:j+1,j+1) call crcrot1(j+1,t(1,j+1),c,s) c apply new rotation to columns j,j+1 call crcrot2(j+1,t(1,j),t(1,j+1),c(j),s(j)) c zero subdiagonal entry, skip next row t(j+1,j) = 0 j = j + 2 else j = j + 1 end if end do c apply rotations to last column if needed if (j == n) then call crcrot1(j,t(1,j),c,s) end if c apply stored rotations to all columns of u do j = 1,n-1 if (c(j) /= 1) then call crcrot2(n,u(1,j),u(1,j+1),c(j),s(j)) end if end do end subroutine subroutine crcrot1(n,x,c,s) c apply rotations to a column from the left integer n complex x(n), t real c(n-1),s(n-1) integer i do i = 1,n-1 if (c(i) /= 1) then t = x(i)*c(i) - x(i+1)*cmplx(0,s(i)) x(i+1) = x(i+1)*c(i) - x(i)*cmplx(0,s(i)) x(i) = t endif end do end subroutine subroutine crcrot2(n,x,y,c,s) c apply a single rotation from the right to a pair of columns integer n complex x(n),y(n),t real c, s integer i do i = 1,n t = x(i)*c + y(i)*cmplx(0,s) y(i) = y(i)*c + x(i)*cmplx(0,s) x(i) = t end do end subroutine