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1 # Copyright (C) 1993, 1994 John W. Eaton |
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245
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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 the |
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7 # Free Software Foundation; either version 2, or (at your option) any |
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8 # later version. |
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9 # |
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10 # Octave is distributed in the hope that it will be useful, but WITHOUT |
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11 # ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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12 # FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
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13 # 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, 675 Mass Ave, Cambridge, MA 02139, USA. |
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18 |
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4
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19 function retval = linspace (x1, x2, n) |
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20 |
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21 # usage: linspace (x1, x2, n) |
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22 # |
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23 # Return a vector of n equally spaced points between x1 and x2 |
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24 # inclusive. |
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25 # |
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26 # If the final argument is omitted, n = 100 is assumed. |
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27 # |
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28 # All three arguments must be scalars. |
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29 # |
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30 # See also: logspace |
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31 |
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32 if (nargin == 2) |
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33 npoints = 100; |
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34 elseif (nargin == 3) |
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35 if (length (n) == 1) |
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36 npoints = fix (n); |
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4
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37 else |
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38 error ("linspace: arguments must be scalars"); |
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39 endif |
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40 else |
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904
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41 usage ("linspace (x1, x2 [, n])"); |
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4
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42 endif |
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43 |
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44 if (npoints < 2) |
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45 error ("linspace: npoints must be greater than 2"); |
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46 endif |
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47 |
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48 if (length (x1) == 1 && length (x2) == 1) |
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49 delta = (x2 - x1) / (npoints - 1); |
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415
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50 retval = x1:delta:x2; |
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4
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51 else |
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52 error ("linspace: arguments must be scalars"); |
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53 endif |
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54 |
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55 endfunction |
