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/* ContingencyTable.cpp
*
* Copyright (C) 1993-2019 David Weenink
*
* This code 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 2 of the License, or (at
* your option) any later version.
*
* This code 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 work. If not, see <http://www.gnu.org/licenses/>.
*/
#include "ContingencyTable.h"
#include "TableOfReal_extensions.h"
#include "NUM2.h"
Thing_implement (ContingencyTable, TableOfReal, 0);
#define TINY 1e-30
void structContingencyTable :: v1_info () {
structDaata :: v1_info ();
double ndf;
double h, hx, hy, hygx, hxgy, uygx, uxgy, uxy, chisq;
ContingencyTable_getEntropies (this, & h, & hx, & hy, & hygx, & hxgy, & uygx, & uxgy, & uxy);
ContingencyTable_chisq (this, & chisq, & ndf);
MelderInfo_writeLine (U"Number of rows: ", numberOfRows);
MelderInfo_writeLine (U"Number of columns: ", numberOfColumns);
MelderInfo_writeLine (U"Entropies (y is row variable):");
MelderInfo_writeLine (U" Total: ", h);
MelderInfo_writeLine (U" Y: ", hy);
MelderInfo_writeLine (U" X: ", hx);
MelderInfo_writeLine (U" Y given x: ", hygx);
MelderInfo_writeLine (U" X given y: ", hxgy);
MelderInfo_writeLine (U" Dependency of y on x: ", uygx);
MelderInfo_writeLine (U" Dependency of x on y: ", uxgy);
MelderInfo_writeLine (U" Symmetrical dependency: ", uxy);
MelderInfo_writeLine (U" Chi squared: ", chisq);
MelderInfo_writeLine (U" Degrees of freedom: ", ndf);
MelderInfo_writeLine (U" Probability: ", ContingencyTable_chisqProbability (this));
}
autoContingencyTable ContingencyTable_create (integer numberOfRows, integer numberOfColumns) {
try {
autoContingencyTable me = Thing_new (ContingencyTable);
TableOfReal_init (me.get(), numberOfRows, numberOfColumns);
return me;
} catch (MelderError) {
Melder_throw (U"ContingencyTable not created.");
}
}
double ContingencyTable_chisqProbability (ContingencyTable me) {
double chisq, df;
ContingencyTable_chisq (me, & chisq, & df);
if (chisq == 0.0 && df == 0.0)
return 0.0;
return NUMchiSquareQ (chisq, df);
}
double ContingencyTable_cramersStatistic (ContingencyTable me) {
if (my numberOfRows == 1 || my numberOfColumns == 1)
return 0.0;
const double sum = NUMsum (my data.all());
integer nmin = std::min (my numberOfColumns, my numberOfRows);
nmin --;
double chisq, df;
ContingencyTable_chisq (me, & chisq, & df);
if (chisq == 0.0 && df == 0.0)
return 0.0;
return sqrt (chisq / (sum * nmin));
}
double ContingencyTable_contingencyCoefficient (ContingencyTable me) {
const double sum = NUMsum (my data.all());
double chisq, df;
ContingencyTable_chisq (me, & chisq, & df);
if (chisq == 0.0 && df == 0.0)
return 0.0;
return sqrt (chisq / (chisq + (double) sum));
}
void ContingencyTable_chisq (ContingencyTable me, double *out_chisq, double *out_df) {
autoVEC rowSums = rowSums_VEC (my data.get());
autoVEC columnSums = columnSums_VEC (my data.get());
const double totalSum = NUMsum (my data.all());
integer nrow = my numberOfRows, ncol = my numberOfColumns;
for (integer irow = 1; irow <= my numberOfRows; irow ++)
if (rowSums [irow] == 0.0)
nrow --;
if (nrow == 0) {
if (out_chisq)
*out_chisq = undefined;
if (out_df)
*out_df = undefined;
return;
}
for (integer icol = 1; icol <= my numberOfColumns; icol ++)
if (columnSums [icol] == 0.0)
ncol --;
if (out_df)
*out_df = (nrow - 1.0) * (ncol - 1.0);
if (out_chisq) {
longdouble chisq = 0.0;
for (integer irow = 1; irow <= my numberOfRows; irow ++) {
if (rowSums [irow] > 0.0) {
for (integer icol = 1; icol <= my numberOfColumns; icol ++) {
if (columnSums [icol] > 0.0) {
const longdouble expected = rowSums [irow] * columnSums [icol] / totalSum;
const longdouble difference = my data [irow] [icol] - expected;
chisq += difference * difference / expected;
}
}
}
}
*out_chisq = (double) chisq;
}
}
void ContingencyTable_getEntropies (ContingencyTable me, double *out_h, double *out_hx, double *out_hy, double *out_hygx, double *out_hxgy, double *out_uygx, double *out_uxgy, double *out_uxy) {
NUMgetEntropies (my data.get(), out_h, out_hx,
out_hy, out_hygx, out_hxgy, out_uygx, out_uxgy, out_uxy);
}
autoContingencyTable Confusion_to_ContingencyTable (Confusion me) {
try {
autoContingencyTable thee = Thing_new (ContingencyTable);
my structTableOfReal :: v1_copy (thee.get());
return thee;
} catch (MelderError) {
Melder_throw (me, U": not converted to ContingencyTable.");
}
}
autoContingencyTable TableOfReal_to_ContingencyTable (TableOfReal me) {
try {
Melder_require (TableOfReal_isNonNegative (me),
U"No cell in the table should be negative.");
autoContingencyTable thee = Thing_new (ContingencyTable);
my structTableOfReal :: v1_copy (thee.get());
return thee;
} catch (MelderError) {
Melder_throw (me, U": not converted to ContingencyTable.");
}
}
// End of file ContingencyTable.cpp
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