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1337
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1 function y = postpad (x, l, c) |
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904
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2 |
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1337
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3 # postpad (x, l) |
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4 # |
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904
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5 # Appends zeros to the vector x until it is of length l. |
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1337
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6 # postpad (x, l, c) appends the constant c instead of zero. |
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561
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7 # |
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1337
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8 # If length (x) > l, elements from the end of x are removed |
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904
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9 # until a vector of length l is obtained. |
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561
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10 |
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11 # Author: |
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12 # Tony Richardson |
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13 # amr@mpl.ucsd.edu |
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14 # June 1994 |
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15 |
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1337
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16 if (nargin == 2) |
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561
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17 c = 0; |
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18 elseif (nargin < 2 || nargin > 3) |
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19 usage ("postpad (x, l) or postpad (x, l, c)"); |
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561
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20 endif |
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21 |
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1337
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22 if (is_matrix (x)) |
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23 error ("first argument must be a vector"); |
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24 elseif (! is_scalar (l)) |
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25 error ("second argument must be a scaler"); |
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561
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26 endif |
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27 |
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28 if (l < 0) |
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29 error ("second argument must be non-negative"); |
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561
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30 endif |
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31 |
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1337
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32 lx = length (x); |
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561
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33 |
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1337
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34 if (lx >= l) |
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561
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35 y = x(1:l); |
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36 else |
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1337
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37 if (rows (x) > 1) |
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38 tmp = c * ones (l-lx, 1); |
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39 y = [x; tmp]; |
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561
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40 else |
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1337
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41 tmp = c * ones (1, l-lx); |
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42 y = [x, tmp]; |
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561
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43 endif |
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44 endif |
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45 |
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46 endfunction |
