Mercurial > octave
annotate scripts/elfun/asech.m @ 27898:4d6d21839dfd
remove Author: jwe and Adapted-by: jwe lines from source files
These lines have little meaning now in the age of modern version
control systems.
Files affected: url-transfer.cc, url-transfer.h, acot.m, acoth.m,
acsc.m, acsch.m, asec.m, asech.m, cot.m, coth.m, csc.m, csch.m, sec.m,
sech.m, cart2pol.m, cart2sph.m, deal.m, fliplr.m, flipud.m, int2str.m,
logspace.m, num2str.m, pol2cart.m, rot90.m, sortrows.m, sph2cart.m,
waitbar.m, doc.m, hsv2rgb.m, rgb2hsv.m, beep.m, isstr.m, setstr.m,
strmatch.m, cond.m, rank.m, trace.m, bug_report.m, cast.m, delete.m,
dir.m, list_primes.m, ls.m, ls_command.m, menu.m, pack.m, recycle.m,
substruct.m, version.m, glpk.m, axis.m, box.m, grid.m,
__axis_label__.m, text.m, title.m, view.m, xlabel.m, ylabel.m,
zlabel.m, bar.m, barh.m, comet3.m, hist.m, line.m, loglog.m, mesh.m,
patch.m, plot.m, polar.m, __bar__.m, __line__.m, __plt__.m,
__stem__.m, semilogx.m, semilogy.m, sombrero.m, stairs.m, stem.m,
surface.m, __default_plot_options__.m, __gnuplot_drawnow__.m,
__next_line_color__.m, __plt_get_axis_arg__.m, __pltopt__.m, clf.m,
closereq.m, gca.m, gnuplot_binary.in.m, isfigure.m, meshgrid.m,
__gnuplot_draw_axes__.m, __gnuplot_draw_figure__.m, shg.m, addpref.m,
getpref.m, ispref.m, loadprefs.m, prefsfile.m, saveprefs.m, rmpref.m,
setpref.m, ismember.m, setdiff.m, union.m, hankel.m, hilb.m, vander.m,
median.m, std.m, cstrcat.m, isletter.m, str2num.m, strcat.m,
oruntests.m, rundemos.m, asctime.m, clock.m, ctime.m, date.m, etime.m,
is_leap_year.m.
author | John W. Eaton <jwe@octave.org> |
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date | Thu, 02 Jan 2020 15:43:01 -0500 |
parents | 04e5cb5e2cb3 |
children | b442ec6dda5c |
rev | line source |
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John W. Eaton <jwe@octave.org>
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1 ## Copyright (C) 1994-2019 John W. Eaton |
2313 | 2 ## |
3 ## This file is part of Octave. | |
4 ## | |
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5 ## Octave is free software: you can redistribute it and/or modify it |
2313 | 6 ## under the terms of the GNU General Public License as published by |
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7 ## the Free Software Foundation, either version 3 of the License, or |
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8 ## (at your option) any later version. |
2313 | 9 ## |
10 ## Octave is distributed in the hope that it will be useful, but | |
11 ## WITHOUT ANY WARRANTY; without even the implied warranty of | |
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12 ## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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13 ## GNU General Public License for more details. |
2313 | 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 |
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17 ## <https://www.gnu.org/licenses/>. |
2303 | 18 |
3321 | 19 ## -*- texinfo -*- |
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20 ## @deftypefn {} {} asech (@var{x}) |
3428 | 21 ## Compute the inverse hyperbolic secant of each element of @var{x}. |
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22 ## @seealso{sech} |
3321 | 23 ## @end deftypefn |
2311 | 24 |
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25 function y = asech (x) |
2325 | 26 |
713 | 27 if (nargin != 1) |
6046 | 28 print_usage (); |
713 | 29 endif |
30 | |
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31 y = acosh (1 ./ x); |
2325 | 32 |
713 | 33 endfunction |
7385 | 34 |
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35 |
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36 %!testif ; ! ismac () |
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37 %! v = [0, pi*i]; |
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38 %! x = [1, -1]; |
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39 %! assert (asech (x), v, sqrt (eps)); |
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40 |
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41 %!xtest <*52627> |
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42 %! ## Same test code as above, but intended only for test statistics on Mac. |
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43 %! ## Mac trig/hyperbolic functions have huge tolerances. |
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44 %! if (! ismac ()), return; endif |
7385 | 45 %! v = [0, pi*i]; |
46 %! x = [1, -1]; | |
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47 %! assert (asech (x), v, sqrt (eps)); |
7385 | 48 |
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49 %!error asech () |
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50 %!error asech (1, 2) |