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annotate main/specfun/inst/cosint.m @ 2713:e69a683bfcf5 octave-forge

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Initial commit into CVS.
author sis-sou
date Tue, 17 Oct 2006 11:32:30 +0000
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children 73fa4496fb07
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2713
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1 ## Copyright (C) 2006 Sissou <sylvain.pelissier@gmail.com>
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2 ##
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3 ## This program is free software; you can redistribute it and/or modify
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4 ## it under the terms of the GNU General Public License as published by
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5 ## the Free Software Foundation; either version 2 of the License, or
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6 ## (at your option) any later version.
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7 ##
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8 ## This program is distributed in the hope that it will be useful,
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9 ## but WITHOUT ANY WARRANTY; without even the implied warranty of
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10 ## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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11 ## GNU General Public License for more details.
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12 ##
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13 ## You should have received a copy of the GNU General Public License
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14 ## along with this program; if not, write to the Free Software
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15 ## Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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16
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17 ## COSINT compute the cosine integral function define by:
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18 ##
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19 ## Inf
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20 ## /
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21 ## cosint(x) = | cos(t)/t dt
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22 ## /
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23 ## x
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24 ##
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25 ##See also : Ci, Si, sinint, expint, expint_Ei.
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26
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27 function y = cosint(z)
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28 if (nargin != 1)
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29 usage ("cosint(x)");
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30 endif
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31 y = Ci(z);
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32 endfunction;