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1 function retval = linspace (x1, x2, n) |
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2 |
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3 # usage: linspace (x1, x2, n) |
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4 # |
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5 # Return a vector of n equally spaced points between x1 and x2 |
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6 # inclusive. |
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7 # |
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8 # If the final argument is omitted, n = 100 is assumed. |
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9 # |
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10 # All three arguments must be scalars. |
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11 # |
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12 # See also: logspace |
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13 |
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14 if (nargin == 2) |
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15 npoints = 100; |
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16 elseif (nargin == 3) |
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17 if (length (n) == 1) |
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18 npoints = n; |
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19 else |
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20 error ("linspace: arguments must be scalars"); |
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21 endif |
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22 else |
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23 error ("usage: linspace (x1, x2 [, n])"); |
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24 endif |
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25 |
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26 if (npoints < 2) |
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27 error ("linspace: npoints must be greater than 2"); |
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28 endif |
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29 |
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30 if (length (x1) == 1 && length (x2) == 1) |
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31 delta = (x2 - x1) / (npoints - 1); |
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32 retval = zeros (1, npoints); |
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33 for i = 0:npoints-1 |
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34 retval (i+1) = x1 + i * delta; |
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35 endfor |
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36 else |
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37 error ("linspace: arguments must be scalars"); |
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38 endif |
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39 |
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40 endfunction |
