Mercurial > hg > octave-nkf
annotate scripts/statistics/distributions/wblpdf.m @ 14363:f3d52523cde1
Use Octave coding conventions in all m-file %!test blocks
* wavread.m, acosd.m, acot.m, acotd.m, acoth.m, acsc.m, acscd.m, acsch.m,
asec.m, asecd.m, asech.m, asind.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, accumarray.m,
accumdim.m, bitcmp.m, bitget.m, bitset.m, blkdiag.m, cart2pol.m, cart2sph.m,
celldisp.m, chop.m, circshift.m, colon.m, common_size.m, cplxpair.m,
cumtrapz.m, curl.m, dblquad.m, deal.m, divergence.m, flipdim.m, fliplr.m,
flipud.m, genvarname.m, gradient.m, idivide.m, int2str.m, interp1.m,
interp1q.m, interp2.m, interp3.m, interpft.m, interpn.m, isa.m, isdir.m,
isequal.m, isequalwithequalnans.m, issquare.m, logspace.m, nargchk.m,
narginchk.m, nargoutchk.m, nextpow2.m, nthargout.m, num2str.m, pol2cart.m,
polyarea.m, postpad.m, prepad.m, profile.m, profshow.m, quadgk.m, quadv.m,
randi.m, rat.m, repmat.m, rot90.m, rotdim.m, shift.m, shiftdim.m, sph2cart.m,
structfun.m, trapz.m, triplequad.m, convhull.m, dsearch.m, dsearchn.m,
griddata3.m, griddatan.m, rectint.m, tsearchn.m, __makeinfo__.m, doc.m,
get_first_help_sentence.m, help.m, type.m, unimplemented.m, which.m, imread.m,
imwrite.m, dlmwrite.m, fileread.m, is_valid_file_id.m, strread.m, textread.m,
textscan.m, commutation_matrix.m, cond.m, condest.m, cross.m,
duplication_matrix.m, expm.m, housh.m, isdefinite.m, ishermitian.m,
issymmetric.m, logm.m, normest.m, null.m, onenormest.m, orth.m, planerot.m,
qzhess.m, rank.m, rref.m, trace.m, vech.m, ans.m, bincoeff.m, bug_report.m,
bzip2.m, comma.m, compare_versions.m, computer.m, edit.m, fileparts.m,
fullfile.m, getfield.m, gzip.m, info.m, inputname.m, isappdata.m, isdeployed.m,
ismac.m, ispc.m, isunix.m, list_primes.m, ls.m, mexext.m, namelengthmax.m,
news.m, orderfields.m, paren.m, recycle.m, rmappdata.m, semicolon.m,
setappdata.m, setfield.m, substruct.m, symvar.m, ver.m, version.m,
warning_ids.m, xor.m, fminbnd.m, fsolve.m, fzero.m, lsqnonneg.m, optimset.m,
pqpnonneg.m, sqp.m, matlabroot.m, __gnuplot_drawnow__.m,
__plt_get_axis_arg__.m, ancestor.m, cla.m, clf.m, close.m, colorbar.m,
colstyle.m, comet3.m, contourc.m, figure.m, gca.m, gcbf.m, gcbo.m, gcf.m,
ginput.m, graphics_toolkit.m, gtext.m, hggroup.m, hist.m, hold.m, isfigure.m,
ishghandle.m, ishold.m, isocolors.m, isonormals.m, isosurface.m, isprop.m,
legend.m, line.m, loglog.m, loglogerr.m, meshgrid.m, ndgrid.m, newplot.m,
orient.m, patch.m, plot3.m, plotyy.m, __print_parse_opts__.m, quiver3.m,
refreshdata.m, ribbon.m, semilogx.m, semilogxerr.m, semilogy.m, stem.m,
stem3.m, subplot.m, title.m, uigetfile.m, view.m, whitebg.m, compan.m, conv.m,
deconv.m, mkpp.m, mpoles.m, pchip.m, poly.m, polyaffine.m, polyder.m,
polyfit.m, polygcd.m, polyint.m, polyout.m, polyval.m, polyvalm.m, ppder.m,
ppint.m, ppjumps.m, ppval.m, residue.m, roots.m, spline.m, intersect.m,
ismember.m, powerset.m, setdiff.m, setxor.m, union.m, unique.m,
autoreg_matrix.m, bartlett.m, blackman.m, detrend.m, fftconv.m, fftfilt.m,
fftshift.m, freqz.m, hamming.m, hanning.m, ifftshift.m, sinc.m, sinetone.m,
sinewave.m, unwrap.m, bicg.m, bicgstab.m, gmres.m, gplot.m, nonzeros.m, pcg.m,
pcr.m, spaugment.m, spconvert.m, spdiags.m, speye.m, spfun.m, spones.m,
sprand.m, sprandsym.m, spstats.m, spy.m, svds.m, treelayout.m, bessel.m,
beta.m, betaln.m, factor.m, factorial.m, isprime.m, lcm.m, legendre.m,
nchoosek.m, nthroot.m, perms.m, pow2.m, primes.m, reallog.m, realpow.m,
realsqrt.m, hadamard.m, hankel.m, hilb.m, invhilb.m, magic.m, rosser.m,
vander.m, __finish__.m, center.m, cloglog.m, corr.m, cov.m, gls.m, histc.m,
iqr.m, kendall.m, kurtosis.m, logit.m, mahalanobis.m, mean.m, meansq.m,
median.m, mode.m, moment.m, ols.m, ppplot.m, prctile.m, probit.m, quantile.m,
range.m, ranks.m, run_count.m, runlength.m, skewness.m, spearman.m,
statistics.m, std.m, table.m, var.m, zscore.m, betacdf.m, betainv.m, betapdf.m,
betarnd.m, binocdf.m, binoinv.m, binopdf.m, binornd.m, cauchy_cdf.m,
cauchy_inv.m, cauchy_pdf.m, cauchy_rnd.m, chi2cdf.m, chi2inv.m, chi2pdf.m,
chi2rnd.m, discrete_cdf.m, discrete_inv.m, discrete_pdf.m, discrete_rnd.m,
empirical_cdf.m, empirical_inv.m, empirical_pdf.m, empirical_rnd.m, expcdf.m,
expinv.m, exppdf.m, exprnd.m, fcdf.m, finv.m, fpdf.m, frnd.m, gamcdf.m,
gaminv.m, gampdf.m, gamrnd.m, geocdf.m, geoinv.m, geopdf.m, geornd.m,
hygecdf.m, hygeinv.m, hygepdf.m, hygernd.m, kolmogorov_smirnov_cdf.m,
laplace_cdf.m, laplace_inv.m, laplace_pdf.m, laplace_rnd.m, logistic_cdf.m,
logistic_inv.m, logistic_pdf.m, logistic_rnd.m, logncdf.m, logninv.m,
lognpdf.m, lognrnd.m, nbincdf.m, nbininv.m, nbinpdf.m, nbinrnd.m, normcdf.m,
norminv.m, normpdf.m, normrnd.m, poisscdf.m, poissinv.m, poisspdf.m,
poissrnd.m, stdnormal_cdf.m, stdnormal_inv.m, stdnormal_pdf.m, stdnormal_rnd.m,
tcdf.m, tinv.m, tpdf.m, trnd.m, unidcdf.m, unidinv.m, unidpdf.m, unidrnd.m,
unifcdf.m, unifinv.m, unifpdf.m, unifrnd.m, wblcdf.m, wblinv.m, wblpdf.m,
wblrnd.m, kolmogorov_smirnov_test.m, kruskal_wallis_test.m, base2dec.m,
bin2dec.m, blanks.m, cstrcat.m, deblank.m, dec2base.m, dec2bin.m, dec2hex.m,
findstr.m, hex2dec.m, index.m, isletter.m, mat2str.m, rindex.m, str2num.m,
strcat.m, strjust.m, strmatch.m, strsplit.m, strtok.m, strtrim.m, strtrunc.m,
substr.m, validatestring.m, demo.m, example.m, fail.m, speed.m, addtodate.m,
asctime.m, clock.m, ctime.m, date.m, datenum.m, datetick.m, datevec.m,
eomday.m, etime.m, is_leap_year.m, now.m:
Use Octave coding conventions in all m-file %!test blocks
author | Rik <octave@nomad.inbox5.com> |
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date | Mon, 13 Feb 2012 07:29:44 -0800 |
parents | 4d917a6a858b |
children | d63878346099 |
rev | line source |
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1 ## Copyright (C) 2012 Rik Wehbring |
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2 ## Copyright (C) 1995-2012 Kurt Hornik |
5693 | 3 ## |
4 ## This file is part of Octave. | |
5 ## | |
6 ## Octave is free software; you can redistribute it and/or modify it | |
7 ## under the terms of the GNU General Public License as published by | |
7016 | 8 ## the Free Software Foundation; either version 3 of the License, or (at |
9 ## your option) any later version. | |
5693 | 10 ## |
11 ## Octave is distributed in the hope that it will be useful, but | |
12 ## WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 ## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
14 ## General Public License for more details. | |
15 ## | |
16 ## You should have received a copy of the GNU General Public License | |
7016 | 17 ## along with Octave; see the file COPYING. If not, see |
18 ## <http://www.gnu.org/licenses/>. | |
5693 | 19 |
20 ## -*- texinfo -*- | |
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21 ## @deftypefn {Function File} {} wblpdf (@var{x}) |
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22 ## @deftypefnx {Function File} {} wblpdf (@var{x}, @var{scale}) |
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23 ## @deftypefnx {Function File} {} wblpdf (@var{x}, @var{scale}, @var{shape}) |
5693 | 24 ## Compute the probability density function (PDF) at @var{x} of the |
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25 ## Weibull distribution with scale parameter @var{scale} and shape |
5693 | 26 ## parameter @var{shape} which is given by |
6754 | 27 ## @tex |
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28 ## $$ {shape \over scale^{shape}} \cdot x^{shape-1} \cdot e^{-({x \over scale})^{shape}} $$ |
6754 | 29 ## @end tex |
30 ## @ifnottex | |
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31 ## |
5693 | 32 ## @example |
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33 ## shape * scale^(-shape) * x^(shape-1) * exp (-(x/scale)^shape) |
5693 | 34 ## @end example |
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35 ## |
6754 | 36 ## @end ifnottex |
5693 | 37 ## @noindent |
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38 ## for @var{x} @geq{} 0. |
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39 ## |
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40 ## Default values are @var{scale} = 1, @var{shape} = 1. |
5693 | 41 ## @end deftypefn |
42 | |
43 ## Author: KH <Kurt.Hornik@wu-wien.ac.at> | |
44 ## Description: PDF of the Weibull distribution | |
45 | |
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46 function pdf = wblpdf (x, scale = 1, shape = 1) |
5693 | 47 |
48 if (nargin < 1 || nargin > 3) | |
6046 | 49 print_usage (); |
5693 | 50 endif |
51 | |
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52 if (!isscalar (scale) || !isscalar (shape)) |
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53 [retval, x, scale, shape] = common_size (x, scale, shape); |
5693 | 54 if (retval > 0) |
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55 error ("wblpdf: X, SCALE, and SHAPE must be of common size or scalars"); |
5693 | 56 endif |
57 endif | |
58 | |
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59 if (iscomplex (x) || iscomplex (scale) || iscomplex (shape)) |
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60 error ("wblpdf: X, SCALE, and SHAPE must not be complex"); |
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61 endif |
5693 | 62 |
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63 if (isa (x, "single") || isa (scale, "single") || isa (shape, "single")) |
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64 pdf = NaN (size (x), "single"); |
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65 else |
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66 pdf = NaN (size (x)); |
5693 | 67 endif |
68 | |
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69 ok = ((scale > 0) & (scale < Inf) & (shape > 0) & (shape < Inf)); |
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70 |
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71 k = (x < 0) & ok; |
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72 pdf(k) = 0; |
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73 |
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74 k = (x >= 0) & (x < Inf) & ok; |
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75 if (isscalar (scale) && isscalar (shape)) |
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76 pdf(k) = (shape * (scale .^ -shape) |
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77 .* (x(k) .^ (shape - 1)) |
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78 .* exp (- (x(k) / scale) .^ shape)); |
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79 else |
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80 pdf(k) = (shape(k) .* (scale(k) .^ -shape(k)) |
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81 .* (x(k) .^ (shape(k) - 1)) |
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82 .* exp (- (x(k) ./ scale(k)) .^ shape(k))); |
5693 | 83 endif |
84 | |
85 endfunction | |
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86 |
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87 |
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88 %!shared x,y |
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89 %! x = [-1 0 0.5 1 Inf]; |
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90 %! y = [0, exp(-x(2:4)), NaN]; |
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91 %!assert (wblpdf (x, ones (1,5), ones (1,5)), y) |
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92 %!assert (wblpdf (x, 1, ones (1,5)), y) |
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93 %!assert (wblpdf (x, ones (1,5), 1), y) |
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94 %!assert (wblpdf (x, [0 NaN Inf 1 1], 1), [NaN NaN NaN y(4:5)]) |
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95 %!assert (wblpdf (x, 1, [0 NaN Inf 1 1]), [NaN NaN NaN y(4:5)]) |
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96 %!assert (wblpdf ([x, NaN], 1, 1), [y, NaN]) |
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97 |
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98 %% Test class of input preserved |
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99 %!assert (wblpdf (single ([x, NaN]), 1, 1), single ([y, NaN])) |
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100 %!assert (wblpdf ([x, NaN], single (1), 1), single ([y, NaN])) |
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101 %!assert (wblpdf ([x, NaN], 1, single (1)), single ([y, NaN])) |
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102 |
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103 %% Test input validation |
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104 %!error wblpdf () |
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105 %!error wblpdf (1,2,3,4) |
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106 %!error wblpdf (ones (3), ones (2), ones (2)) |
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107 %!error wblpdf (ones (2), ones (3), ones (2)) |
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108 %!error wblpdf (ones (2), ones (2), ones (3)) |
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|
109 %!error wblpdf (i, 2, 2) |
19b9f17d22af
Overhaul of statistical distribution functions
Rik <octave@nomad.inbox5.com>
parents:
12696
diff
changeset
|
110 %!error wblpdf (2, i, 2) |
19b9f17d22af
Overhaul of statistical distribution functions
Rik <octave@nomad.inbox5.com>
parents:
12696
diff
changeset
|
111 %!error wblpdf (2, 2, i) |
19b9f17d22af
Overhaul of statistical distribution functions
Rik <octave@nomad.inbox5.com>
parents:
12696
diff
changeset
|
112 |