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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 "types.h"
#include "pow.h"
#include "uint16.h"
#include "zeros.h"
#include "sum.h"
#include "ones.h"
#include "matrixMultiplication.h"
#include "division.h"
#include "matrixTranspose.h"
#include "subtraction.h"
#include "division.h"
void smvcorrela(float *in, int lx, int cx, float* r)
{
float temp1[1* cx];
float xbar[1* cx];
float temp2[lx*1];
float temp3[lx*cx];
float temp4[lx*cx];
float temp4_trans[cx*lx];
float temp5[1* cx];
float temp6[lx*cx];
float std[1*cx];
float std_trans[cx*1];
float temp7[cx*cx];
float temp8[cx*cx];
sonesa ( temp2 , lx , 1 ); //temp2= ones(lx,1)
if(lx==1)
{
szerosa ( r , cx ,cx ); //out= zeros(lx,cx)
}
else
{
srowsuma(in, lx, cx, temp1); //temp1= sum(x, "r")
for(int i=0; i< 1*cx; i++)
xbar[i]= srdivs(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");*/
smulma(temp2, lx,1, xbar, 1, cx, temp3 ); //temp3= ones(lx,1)*xbar
sdiffa(in, lx*cx, temp3, lx*cx, temp4); //temp4= r= x-ones(lx,1)*xbar
for(int i=0; i< lx*cx; i++)
temp6[i]= spows(temp4[i], 2); //temp6= r.^2
srowsuma(temp6, lx, cx, temp5); //temp5= sum(r.^2, "r")
for(int i=0; i< 1*cx; i++)
std[i]= spows(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"); */
stransposea ( temp4 , lx , cx, temp4_trans); //temp4_trans= r'
stransposea ( std , 1 , cx, std_trans); //std_trans= std'
smulma(temp4_trans, cx,lx, temp4, lx, cx, temp7 ); //temp7= r'*r
smulma(std_trans, cx, 1, std, 1,cx, temp8); //temp8= std'*std
srdiva (temp7, temp8, cx*cx, r); // r=(r'*r) ./ (std'*std)
}
}
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