Mercurial > hg > octave-nkf
annotate scripts/statistics/base/qqplot.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 | 72c96de7a403 |
children | 1c89599167a6 |
rev | line source |
---|---|
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1 ## Copyright (C) 1995-2012 Kurt Hornik |
3426 | 2 ## |
3922 | 3 ## This file is part of Octave. |
4 ## | |
5 ## Octave is free software; you can redistribute it and/or modify it | |
6 ## under the terms of the GNU General Public License as published by | |
7016 | 7 ## the Free Software Foundation; either version 3 of the License, or (at |
8 ## your option) any later version. | |
3426 | 9 ## |
3922 | 10 ## Octave is distributed in the hope that it will be useful, but |
3200 | 11 ## WITHOUT ANY WARRANTY; without even the implied warranty of |
12 ## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
3426 | 13 ## General Public License for more details. |
14 ## | |
3200 | 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/>. | |
3200 | 18 |
3453 | 19 ## -*- texinfo -*- |
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20 ## @deftypefn {Function File} {[@var{q}, @var{s}] =} qqplot (@var{x}) |
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21 ## @deftypefnx {Function File} {[@var{q}, @var{s}] =} qqplot (@var{x}, @var{dist}) |
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22 ## @deftypefnx {Function File} {[@var{q}, @var{s}] =} qqplot (@var{x}, @var{dist}, @var{params}) |
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23 ## @deftypefnx {Function File} {} qqplot (@dots{}) |
3453 | 24 ## Perform a QQ-plot (quantile plot). |
3200 | 25 ## |
3453 | 26 ## If F is the CDF of the distribution @var{dist} with parameters |
27 ## @var{params} and G its inverse, and @var{x} a sample vector of length | |
28 ## @var{n}, the QQ-plot graphs ordinate @var{s}(@var{i}) = @var{i}-th | |
29 ## largest element of x versus abscissa @var{q}(@var{i}f) = G((@var{i} - | |
30 ## 0.5)/@var{n}). | |
3200 | 31 ## |
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32 ## If the sample comes from F, except for a transformation of location |
3200 | 33 ## and scale, the pairs will approximately follow a straight line. |
34 ## | |
3453 | 35 ## The default for @var{dist} is the standard normal distribution. The |
36 ## optional argument @var{params} contains a list of parameters of | |
37 ## @var{dist}. For example, for a quantile plot of the uniform | |
38 ## distribution on [2,4] and @var{x}, use | |
39 ## | |
40 ## @example | |
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41 ## qqplot (x, "unif", 2, 4) |
3453 | 42 ## @end example |
3200 | 43 ## |
6754 | 44 ## @noindent |
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45 ## @var{dist} can be any string for which a function @var{distinv} or |
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46 ## @var{dist_inv} exists that calculates the inverse CDF of distribution |
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47 ## @var{dist}. |
6754 | 48 ## |
3200 | 49 ## If no output arguments are given, the data are plotted directly. |
3453 | 50 ## @end deftypefn |
3200 | 51 |
5428 | 52 ## Author: KH <Kurt.Hornik@wu-wien.ac.at> |
3456 | 53 ## Description: Perform a QQ-plot (quantile plot) |
3200 | 54 |
3979 | 55 function [q, s] = qqplot (x, dist, varargin) |
3426 | 56 |
3200 | 57 if (nargin < 1) |
6046 | 58 print_usage (); |
3200 | 59 endif |
3426 | 60 |
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61 if (!(isnumeric (x) && isvector (x))) |
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62 error ("qqplot: X must be a numeric vector"); |
3200 | 63 endif |
64 | |
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65 if (nargin == 1) |
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66 f = @stdnormal_inv; |
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67 else |
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68 if ( exist (invname = sprintf ("%sinv", dist)) |
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69 || exist (invname = sprintf ("%s_inv", dist))) |
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70 f = str2func (invname); |
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71 else |
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72 error ("qqplot: no inverse CDF found for distribution DIST"); |
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73 endif |
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74 endif; |
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75 |
3200 | 76 s = sort (x); |
77 n = length (x); | |
78 t = ((1 : n)' - .5) / n; | |
79 if (nargin <= 2) | |
80 q = feval (f, t); | |
4348 | 81 q_label = func2str (f); |
3200 | 82 else |
5153 | 83 q = feval (f, t, varargin{:}); |
84 if (nargin > 3) | |
85 tmp = sprintf (", %g", varargin{2:end}); | |
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86 else |
5153 | 87 tmp = ""; |
88 endif | |
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89 q_label = sprintf ("%s with parameter(s) %g%s", |
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90 func2str (f), varargin{1}, tmp); |
3200 | 91 endif |
3426 | 92 |
3200 | 93 if (nargout == 0) |
6447 | 94 plot (q, s); |
3200 | 95 xlabel (q_label); |
96 ylabel ("sample points"); | |
97 endif | |
98 | |
99 endfunction |