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/* Copyright (C) 2016 - IIT Bombay - FOSSEE
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
Author: Abhinav Dronamraju
Organization: FOSSEE, IIT Bombay
Email: toolbox@scilab.in
*/
#include "mvcorrel.h"
#include "stdlib.h"
#include "stdio.h"
#include "pow.h"
#include "division.h"
#include "types.h"
#include "uint16.h"
#include "zeros.h"
#include "sum.h"
#include "ones.h"
#include "matrixMultiplication.h"
#include "matrixTranspose.h"
#include "subtraction.h"
#include "division.h"
void dmvcorrela(double *in, int lx, int cx, double* r)
{
double temp1[1* cx];
double xbar[1* cx];
double temp2[lx*1];
double temp3[lx*cx];
double temp4[lx*cx];
double temp4_trans[cx*lx];
double temp5[1* cx];
double temp6[lx*cx];
double std[1*cx];
double std_trans[cx*1];
double temp7[cx*cx];
double temp8[cx*cx];
donesa ( temp2 , lx , 1 ); //temp2= ones(lx,1)
if(lx==1)
{
dzerosa ( r , cx ,cx ); //out= zeros(lx,cx)
}
else
{
drowsuma(in, lx, cx, temp1); //temp1= sum(x, "r")
for(int i=0; i< 1*cx; i++)
xbar[i]= drdivs(temp1[i], lx); // xbar= sum(x, "r")/ lx
/* //Debug Only*/
/* for(int i= 0; i< 1*cx; i++)*/
/* printf("xbar[%d]= %lf\t", i, xbar[i]);*/
/* printf("\n");*/
dmulma(temp2, lx,1, xbar, 1, cx, temp3 ); //temp3= ones(lx,1)*xbar
ddiffa(in, lx*cx, temp3, lx*cx, temp4); //temp4= r= x-ones(lx,1)*xbar
for(int i=0; i< lx*cx; i++)
temp6[i]= dpows(temp4[i], 2); //temp6= r.^2
drowsuma(temp6, lx, cx, temp5); //temp5= sum(r.^2, "r")
for(int i=0; i< 1*cx; i++)
std[i]= dpows(temp5[i], 0.5); //std=(sum(r .^2,"r")) .^ (0.5)
/* //Debug Only*/
/* for(int i= 0; i< 1*cx; i++)*/
/* printf("std[%d]= %lf\t", i, std[i]);*/
/* printf("\n"); */
dtransposea ( temp4 , lx , cx, temp4_trans); //temp4_trans= r'
dtransposea ( std , 1 , cx, std_trans); //std_trans= std'
dmulma(temp4_trans, cx,lx, temp4, lx, cx, temp7 ); //temp7= r'*r
dmulma(std_trans, cx, 1, std, 1,cx, temp8); //temp8= std'*std
drdiva (temp7, temp8, cx*cx, r); // r=(r'*r) ./ (std'*std)
}
}
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