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1 ## Copyright (C) 1996, 1997, 2006, 2007 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 3 of the License, or (at |
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8 ## your option) 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, see |
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17 ## <http://www.gnu.org/licenses/>. |
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18 |
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19 ## -*- texinfo -*- |
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20 ## @deftypefn {Function File} {} etime (@var{t1}, @var{t2}) |
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21 ## Return the difference (in seconds) between two time values returned from |
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22 ## @code{clock}. For example: |
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23 ## |
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24 ## @example |
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25 ## t0 = clock (); |
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26 ## # many computations later... |
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27 ## elapsed_time = etime (clock (), t0); |
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28 ## @end example |
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29 ## |
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30 ## @noindent |
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31 ## will set the variable @code{elapsed_time} to the number of seconds since |
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32 ## the variable @code{t0} was set. |
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33 ## @seealso{tic, toc, clock, cputime} |
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34 ## @end deftypefn |
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35 |
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36 ## Author: jwe |
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37 |
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38 function secs = etime (t1, t0) |
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39 |
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40 if (nargin != 2) |
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41 print_usage (); |
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42 endif |
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43 |
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44 [d1, s1] = datenum (t1); |
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45 [d0, s0] = datenum (t0); |
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46 |
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47 secs = s1 - s0; |
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48 |
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49 endfunction |
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50 |
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51 %!assert(etime([1900,12,31,23,59,59],[1901,1,1,0,0,0]),-1) |
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52 %!assert(etime([1900,2,28,23,59,59],[1900,3,1,0,0,0]),-1) |
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53 %!assert(etime([2000,2,28,23,59,59],[2000,3,1,0,0,0]),-86401) |
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54 %!assert(etime([1996,2,28,23,59,59],[1996,3,1,0,0,0]),-86401) |
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55 %!test |
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56 %! t1 = [1900,12,31,23,59,59; 1900,2,28,23,59,59]; |
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57 %! t2 = [1901,1,1,0,0,0; 1900,3,1,0,0,0]; |
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58 %! assert(etime(t2, t1), [1;1]); |
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59 |
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60 %!test |
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61 %! t1 = [1993, 8, 20, 4, 56, 1]; |
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62 %! t2 = [1993, 8, 21, 4, 56, 1]; |
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63 %! t3 = [1993, 8, 20, 5, 56, 1]; |
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64 %! t4 = [1993, 8, 20, 4, 57, 1]; |
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65 %! t5 = [1993, 8, 20, 4, 56, 14]; |
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66 %! |
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67 %! assert((etime (t2, t1) == 86400 && etime (t3, t1) == 3600 |
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68 %! && etime (t4, t1) == 60 && etime (t5, t1) == 13)); |
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69 |
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70 %!error etime (); |
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71 |
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72 %!error etime (1, 2, 3); |
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73 |
