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Diffstat (limited to 'src/c/statisticsFunctions/stdevf/scolumnstdevfa.c')
| -rw-r--r-- | src/c/statisticsFunctions/stdevf/scolumnstdevfa.c | 69 |
1 files changed, 69 insertions, 0 deletions
diff --git a/src/c/statisticsFunctions/stdevf/scolumnstdevfa.c b/src/c/statisticsFunctions/stdevf/scolumnstdevfa.c new file mode 100644 index 0000000..f3552ea --- /dev/null +++ b/src/c/statisticsFunctions/stdevf/scolumnstdevfa.c @@ -0,0 +1,69 @@ +/* + * Scilab ( http://www.scilab.org/ ) - This file is part of Scilab + * Copyright (C) 2008-2008 - INRIA - Allan SIMON + * + * This file must be used under the terms of the CeCILL. + * This source file is licensed as described in the file COPYING, which + * you should have received as part of this distribution. The terms + * are also available at + * http://www.cecill.info/licences/Licence_CeCILL_V2-en.txt + * + */ + + +#include "stdevf.h" +#include "meanf.h" + + +void scolumnstdevfa(float *in1, int lines, int columns, float *in2, float* out){ + int i = 0; + int j = 0; + float temp = 0.0f; + float accumulate = 0.0f; + float accumulateFre = 0.0f ; + + scolumnmeanfa(in1, lines, columns, in2, out ); + + + /*we first multiply each cell of the input matrix by its coefficient*/ + for (j = 0; j < lines; ++j) + { + accumulate = 0.0f; + accumulateFre= 0.0f; + temp = 0.0f; + + for ( i = 0 ; i < columns; ++i ) + { + temp = spows ( (in1[lines*i + j] - out[j] ) ,2 ); + temp *= in2[lines*i + j]; + + accumulate += temp ; + accumulateFre += in2[lines*i + j]; + } + + if (lines <= 1) + { + out[j] = 0.0f * accumulate ; + } + else + { + out[j] = ssqrts(accumulate / (accumulateFre - 1)); + } + } + +} +/* + + ! +! elseif o == 'c' | o == 2 then ! +! // here ones is used becaue we work on matrix , but in C we work on element so we only need iteratation ! +! y = x - meanf(x, fre, o) * ones(1, size(x, o)) ! +! ! + +! if size(x, 1) == 1 then ! ! +! s = 0 * sum(y.^2 .* fre, o) ! +! else ! ! +! s = sqrt(sum(y.^2 .* fre, o) ./ (sum(fre, o) - 1)); ! + ! +*/ + |