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1 ### Copyright (C) 1996 John W. Eaton |
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2 ### |
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3 ### This file is part of Octave. |
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4 ### |
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5 ### Octave is free software; you can redistribute it and/or modify it |
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6 ### under the terms of the GNU General Public License as published by |
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7 ### the Free Software Foundation; either version 2, or (at your option) |
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8 ### any later version. |
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9 ### |
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10 ### Octave is distributed in the hope that it will be useful, but |
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11 ### WITHOUT ANY WARRANTY; without even the implied warranty of |
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12 ### MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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13 ### General Public License for more details. |
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14 ### |
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15 ### You should have received a copy of the GNU General Public License |
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16 ### along with Octave; see the file COPYING. If not, write to the Free |
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17 ### Software Foundation, 59 Temple Place - Suite 330, Boston, MA |
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18 ### 02111-1307, USA. |
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19 |
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20 function l = lcm (a, ...) |
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21 |
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22 ## usage: lcm (a, ...) |
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23 ## |
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24 ## lcm (a) returns the least common multiple of the entries of the |
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25 ## integer vector a. |
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26 ## lcm (a1, ..., ak) is the same as lcm([a1, ..., ak]). |
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27 |
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28 ## Written by KH (Kurt.Hornik@ci.tuwien.ac.at) on Sep 16, 1994. |
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29 |
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30 if (nargin > 1) |
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31 va_start; |
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32 for k = 2:nargin; |
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33 a = [a, (va_arg ())]; |
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34 endfor |
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35 endif |
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36 |
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37 if (round (a) != a) |
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38 error ("lcm: all arguments must be integer"); |
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39 endif |
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40 |
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904
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41 if (any (a) == 0) |
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42 l = 0; |
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43 else |
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904
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44 a = abs (a); |
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45 l = a (1); |
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46 for k = 1:(length (a) - 1) |
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47 l = l * a(k+1) / gcd (l, a(k+1)); |
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48 endfor |
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49 endif |
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50 |
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51 endfunction |
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52 |
