Mercurial > hg > octave-nkf
annotate scripts/polynomial/polyout.m @ 14868:5d3a684236b0
maint: Use Octave coding conventions for cuddling parentheses in scripts directory
* lin2mu.m, loadaudio.m, wavread.m, accumarray.m, bicubic.m, celldisp.m,
colon.m, cplxpair.m, dblquad.m, divergence.m, genvarname.m, gradient.m,
int2str.m, interp1.m, interp1q.m, interp2.m, interpn.m, loadobj.m, nthargout.m,
__isequal__.m, __splinen__.m, quadgk.m, quadl.m, quadv.m, rat.m, rot90.m,
rotdim.m, saveobj.m, subsindex.m, triplequad.m, delaunay3.m, griddata.m,
inpolygon.m, tsearchn.m, voronoi.m, get_first_help_sentence.m, which.m,
gray2ind.m, pink.m, dlmwrite.m, strread.m, textread.m, textscan.m, housh.m,
ishermitian.m, issymmetric.m, krylov.m, logm.m, null.m, rref.m,
compare_versions.m, copyfile.m, dump_prefs.m, edit.m, fileparts.m,
getappdata.m, isappdata.m, movefile.m, orderfields.m, parseparams.m,
__xzip__.m, rmappdata.m, setappdata.m, swapbytes.m, unpack.m, ver.m, fminbnd.m,
fminunc.m, fsolve.m, glpk.m, lsqnonneg.m, qp.m, sqp.m, configure_make.m,
copy_files.m, describe.m, get_description.m, get_forge_pkg.m, install.m,
installed_packages.m, is_architecture_dependent.m, load_package_dirs.m,
print_package_description.m, rebuild.m, repackage.m, save_order.m, shell.m,
allchild.m, ancestor.m, area.m, axes.m, axis.m, clabel.m, close.m, colorbar.m,
comet.m, comet3.m, contour.m, cylinder.m, ezmesh.m, ezsurf.m, findobj.m,
fplot.m, hist.m, isocolors.m, isonormals.m, isosurface.m, isprop.m, legend.m,
mesh.m, meshz.m, pareto.m, pcolor.m, peaks.m, plot3.m, plotmatrix.m, plotyy.m,
polar.m, print.m, __add_datasource__.m, __add_default_menu__.m,
__axes_limits__.m, __bar__.m, __clabel__.m, __contour__.m, __errcomm__.m,
__errplot__.m, __ezplot__.m, __file_filter__.m, __fltk_print__.m,
__ghostscript__.m, __gnuplot_print__.m, __go_draw_axes__.m,
__go_draw_figure__.m, __interp_cube__.m, __marching_cube__.m, __patch__.m,
__pie__.m, __plt__.m, __print_parse_opts__.m, __quiver__.m, __scatter__.m,
__stem__.m, __tight_eps_bbox__.m, __uigetdir_fltk__.m, __uigetfile_fltk__.m,
__uiputfile_fltk__.m, quiver.m, quiver3.m, rectangle.m, refreshdata.m,
ribbon.m, scatter.m, semilogy.m, shading.m, slice.m, subplot.m, surface.m,
surfl.m, surfnorm.m, text.m, uigetfile.m, uiputfile.m, whitebg.m, deconv.m,
mkpp.m, pchip.m, polyaffine.m, polyder.m, polygcd.m, polyout.m, polyval.m,
ppint.m, ppjumps.m, ppval.m, residue.m, roots.m, spline.m, splinefit.m,
addpref.m, getpref.m, setpref.m, ismember.m, setxor.m, arch_fit.m, arch_rnd.m,
arch_test.m, autoreg_matrix.m, diffpara.m, fftconv.m, filter2.m, hanning.m,
hurst.m, periodogram.m, triangle_sw.m, sinc.m, spectral_xdf.m, spencer.m,
stft.m, synthesis.m, unwrap.m, yulewalker.m, bicgstab.m, gmres.m, pcg.m, pcr.m,
__sprand_impl__.m, speye.m, spfun.m, sprandn.m, spstats.m, svds.m,
treelayout.m, treeplot.m, bessel.m, factor.m, legendre.m, perms.m, primes.m,
magic.m, toeplitz.m, corr.m, cov.m, mean.m, median.m, mode.m, qqplot.m,
quantile.m, ranks.m, zscore.m, logistic_regression_likelihood.m,
bartlett_test.m, chisquare_test_homogeneity.m, chisquare_test_independence.m,
kolmogorov_smirnov_test.m, run_test.m, u_test.m, wilcoxon_test.m, z_test.m,
z_test_2.m, bin2dec.m, dec2base.m, mat2str.m, strcat.m, strchr.m, strjust.m,
strtok.m, substr.m, untabify.m, assert.m, demo.m, example.m, fail.m, speed.m,
test.m, now.m: Use Octave coding conventions for cuddling parentheses in
scripts directory.
author | Rik <octave@nomad.inbox5.com> |
---|---|
date | Tue, 17 Jul 2012 07:08:39 -0700 |
parents | f3d52523cde1 |
children | bc924baa2c4e |
rev | line source |
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1 ## Copyright (C) 1995-2012 Auburn University. All rights reserved. |
3424 | 2 ## |
3 ## This file is part of Octave. | |
4 ## | |
5 ## Octave is free software; you can redistribute it and/or modify it | |
7016 | 6 ## under the terms of the GNU General Public License as published by |
7 ## the Free Software Foundation; either version 3 of the License, or (at | |
8 ## your option) any later version. | |
3424 | 9 ## |
7016 | 10 ## Octave is distributed in the hope that it will be useful, but |
11 ## WITHOUT ANY WARRANTY; without even the implied warranty of | |
12 ## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
13 ## General Public License for more details. | |
3424 | 14 ## |
15 ## You should have received a copy of the GNU General Public License | |
7016 | 16 ## along with Octave; see the file COPYING. If not, see |
17 ## <http://www.gnu.org/licenses/>. | |
3424 | 18 |
19 ## -*- texinfo -*- | |
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20 ## @deftypefn {Function File} {} polyout (@var{c}) |
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21 ## @deftypefnx {Function File} {} polyout (@var{c}, @var{x}) |
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22 ## @deftypefnx {Function File} {@var{str} =} polyout (@dots{}) |
3457 | 23 ## Write formatted polynomial |
5016 | 24 ## @tex |
25 ## $$ c(x) = c_1 x^n + \ldots + c_n x + c_{n+1} $$ | |
26 ## @end tex | |
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27 ## @ifnottex |
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28 ## |
3424 | 29 ## @example |
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30 ## c(x) = c(1) * x^n + @dots{} + c(n) x + c(n+1) |
3424 | 31 ## @end example |
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32 ## |
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33 ## @end ifnottex |
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34 ## and return it as a string or write it to the screen (if @var{nargout} is |
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35 ## zero). @var{x} defaults to the string @code{"s"}. |
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36 ## @seealso{polyreduce} |
5642 | 37 ## @end deftypefn |
3424 | 38 |
39 ## Author: A. S. Hodel <a.s.hodel@eng.auburn.edu> | |
40 ## Created: May 1995 | |
41 ## Nov 1998: Correctly handles complex coefficients | |
3426 | 42 |
3424 | 43 function y = polyout (c, x) |
44 | |
3457 | 45 if (nargin < 1) || (nargin > 2) || (nargout < 0) || (nargout > 1) |
6046 | 46 print_usage (); |
3424 | 47 endif |
48 | |
4030 | 49 if (! isvector (c)) |
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50 error ("polyout: first argument must be a vector"); |
3424 | 51 endif |
3426 | 52 |
3424 | 53 if (nargin == 1) |
54 x = "s"; | |
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55 elseif (! ischar (x)) |
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56 error ("polyout: second argument must be a string"); |
3424 | 57 endif |
58 | |
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59 n = length (c); |
3424 | 60 if(n > 0) |
61 n1 = n+1; | |
62 | |
4898 | 63 tmp = coeff (c(1)); |
3457 | 64 for ii = 2:n |
65 if (real (c(ii)) < 0) | |
10549 | 66 ns = " - "; |
67 c(ii) = -c(ii); | |
3457 | 68 else |
69 ns = " + "; | |
70 endif | |
3424 | 71 |
4898 | 72 tmp = sprintf ("%s*%s^%d%s%s", tmp, x, n1-ii, ns, coeff (c(ii))); |
3426 | 73 |
3424 | 74 endfor |
75 else | |
76 tmp = " "; | |
77 endif | |
78 | |
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79 if (nargout == 0) |
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80 disp (tmp); |
3424 | 81 else |
82 y = tmp; | |
83 endif | |
84 | |
85 endfunction | |
4898 | 86 |
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87 function str = coeff (c) |
4898 | 88 if (imag (c)) |
89 if (real (c)) | |
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90 str = sprintf ("(%s)", num2str (c, 5)); |
4898 | 91 else |
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92 str = num2str (c, 5); |
4898 | 93 endif |
94 else | |
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95 str = num2str (c, 5); |
4898 | 96 endif |
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97 endfunction |
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98 |
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99 |
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100 %!assert (polyout ([3 2 1]), "3*s^2 + 2*s^1 + 1") |
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101 %!assert (polyout ([3 2 1], "x"), "3*x^2 + 2*x^1 + 1") |
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102 %!assert (polyout ([3 2 1], "wxyz"), "3*wxyz^2 + 2*wxyz^1 + 1") |
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103 %!assert (polyout ([5 4 3 2 1], "1"),"5*1^4 + 4*1^3 + 3*1^2 + 2*1^1 + 1") |
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104 |
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105 %!error polyout ([]) |
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106 |