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view main/comm/inst/symerr.m @ 9666:67d4cfc5eeb3 octave-forge
comm: update license to GPLv3+
author | carandraug |
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date | Tue, 13 Mar 2012 04:31:21 +0000 |
parents | 2de537641f94 |
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## Copyright (C) 2003 David Bateman ## ## This program is free software; you can redistribute it and/or modify it under ## the terms of the GNU General Public License as published by the Free Software ## Foundation; either version 3 of the License, or (at your option) any later ## version. ## ## This program is distributed in the hope that it will be useful, but WITHOUT ## ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or ## FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more ## details. ## ## You should have received a copy of the GNU General Public License along with ## this program; if not, see <http://www.gnu.org/licenses/>. ## -*- texinfo -*- ## @deftypefn {Function File} {[@var{num}, @var{rate}] = } symerr (@var{a},@var{b}) ## @deftypefnx {Function File} {[@var{num}, @var{rate}] = } symerr (@var{...},@var{flag}) ## @deftypefnx {Function File} {[@var{num}, @var{rate} @var{ind}] = } symerr (@var{...}) ## ## Compares two matrices and returns the number of symbol errors and the ## symbol error rate. The variables @var{a} and @var{b} can be either: ## ## @table @asis ## @item Both matrices ## In this case both matrices must be the same size and then by default the ## the return values @var{num} and @var{rate} are the overall number of symbol ## errors and the overall symbol error rate. ## @item One column vector ## In this case the column vector is used for symbol error comparision ## column-wise with the matrix. The returned values @var{num} and @var{rate} ## are then row vectors containing the num of symbol errors and the symbol ## error rate for each of the column-wise comparisons. The number of rows in ## the matrix must be the same as the length of the column vector ## @item One row vector ## In this case the row vector is used for symbol error comparision row-wise ## with the matrix. The returned values @var{num} and @var{rate} are then ## column vectors containing the num of symbol errors and the symbol error rate ## for each of the row-wise comparisons. The number of columns in the matrix ## must be the same as the length of the row vector ## @end table ## ## This behaviour can be overridden with the variable @var{flag}. @var{flag} ## can take the value 'column-wise', 'row-wise' or 'overall'. A column-wise ## comparision is not possible with a row vector and visa-versa. ## @end deftypefn ## 2003 FEB 13 ## initial release function [num, rate, ind] = symerr (a, b, _flag) if ((nargin < 2) || (nargin > 4)) usage ("[num rate ind] = symerr (a, b [,flag])"); endif if (any(any(isinf(a))) || any(any(isnan(a))) || any(any(isinf(b))) || ... any(any(isnan(b))) || !real(a) || !real(b) || ... any(any((floor(a)) != a)) || any(any((floor(b)) != b)) || ... any(any(a < 0)) || any(any(b < 0))) error ("symerr: a and b must contain only postive integers"); endif [ar,ac] = size(a); [br,bc] = size(b); if ((ar == br) && (ac == bc)) type = "matrix"; flag = "overall"; c = 1; elseif (any([ar,br] == 1)) type = "row"; flag = "row"; if (ac != bc) error ("symerr: row-wise comparison must have the same number of columns in inputs"); endif if (ar == 1) a = ones(br,1) * a; else b = ones(ar,1) * b; endif elseif (any([ac,bc] == 1)) type = "column"; flag = "column"; if (ar != br) error ("symerr: column-wise comparison must have the same number of rows in inputs"); endif if (ac == 1) a = a * ones(1,bc); else b = b * ones(1,ac); endif else error ("symerr: matrix sizes must match"); endif if (nargin > 2) if (ischar(_flag)) if (strcmp(_flag,"row-wise")) if (strcmp(type,"column")) error ("symerr: row-wise comparison not possible with column inputs"); endif flag = "row"; elseif (strcmp(_flag,"column-wise")) if (strcmp(type,"row")) error ("symerr: column-wise comparison not possible with row inputs"); endif flag = "column"; elseif (strcmp(_flag,"overall")) flag = "overall"; else error ("symerr: unrecognized string argument"); endif else error ("symerr: unrecognized argument"); endif endif ## Call the core error function to count the bit errors ind = (__errcore__(a,b) != 0); switch (flag) case 'row', if (strcmp(type,"matrix") && (ac == 1)) num = ind; else num = sum(ind')'; endif rate = num / max(ac,bc); case 'column', if (strcmp(type,"matrix") && (ar == 1)) num = ind; else num = sum(ind); endif rate = num / max(ar,br); case 'overall', num = sum(sum(ind)); rate = num / max(ar,br) / max(ac,bc); otherwise error("impossible"); endswitch endfunction