1 ## Copyright (C) 2001 Laurent Mazet
3 ## This program is free software; you can redistribute it and/or modify it under
4 ## the terms of the GNU General Public License as published by the Free Software
5 ## Foundation; either version 3 of the License, or (at your option) any later
8 ## This program is distributed in the hope that it will be useful, but WITHOUT
9 ## ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
10 ## FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
13 ## You should have received a copy of the GNU General Public License along with
14 ## this program; if not, see <http://www.gnu.org/licenses/>.
17 ## @deftypefn {Function File} {@var{d} = } bi2de (@var{b})
18 ## @deftypefnx {Function File} {@var{d} = } bi2de (@var{b},@var{f})
19 ## @deftypefnx {Function File} {@var{d} = } bi2de (@var{b},@var{p})
20 ## @deftypefnx {Function File} {@var{d} = } bi2de (@var{b},@var{p},@var{f})
22 ## Convert bit matrix to a vector of integers
24 ## Each row of the matrix @var{b} is treated as a single integer represented
25 ## in binary form. The elements of @var{b}, must therefore be '0' or '1'
27 ## If @var{p} is defined then it is treated as the base of the decomposition
28 ## and the elements of @var{b} must then lie between '0' and 'p-1'.
30 ## The variable @var{f} defines whether the first or last element of @var{b}
31 ## is considered to be the most-significant. Valid values of @var{f} are
32 ## 'right-msb' or 'left-msb'. By default @var{f} is 'right-msb'.
37 function d = bi2de (b, p, f)
60 if ( any (b(:) < 0) || any (b(:) != floor (b(:))) || any (b(:) > p - 1) )
61 error ("bi2de: d must only contain integers in the range [0, p-1]");
64 if (strcmp (f, 'left-msb'))
65 b = b(:,size(b,2):-1:1);
66 elseif (!strcmp (f, 'right-msb'))
67 error ("bi2de: unrecognized flag");
73 d = b * ( p .^ [ 0 : (columns(b)-1) ]' );
79 %! x = randi ([0 1], 100, 16);
80 %!assert (bi2de (0), 0)
81 %!assert (bi2de (1), 1)
82 %!assert (bi2de (ones (1, 8)), 255)
83 %!assert (bi2de ([7 7 7 7], 8), 4095)
84 %!assert (size (bi2de (x)), [100 1])
85 %!assert (bi2de (x, "right-msb"), bi2de (x))
86 %!assert (bi2de (x, "left-msb"), bi2de (fliplr (x)))
88 %% Test input validation
90 %!error bi2de (1, 2, 3, 4)
91 %!error bi2de (1, 2, 3)
92 %!error bi2de (1, 2, "invalid")