https://github.com/cran/spatstat
Tip revision: 8f171b836eb1993abbdc454a2780c057b63d910e authored by Adrian Baddeley on 01 March 2013, 12:28:29 UTC
version 1.31-1
version 1.31-1
Tip revision: 8f171b8
massdisthack.c
/*
HACKED from R-2.0.1/src/appl/massdist.c
by Adrian Baddeley
Changes indicated by 'AB'
*/
/*
* R : A Computer Language for Statistical Data Analysis
* Copyright (C) 1996-2004 Robert Gentleman and Ross Ihaka and the
* R Development Core Team
*
* 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 2 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, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#include <R_ext/Arith.h>
#include <R_ext/Applic.h>
void massdisthack(double *x, int *nx,
double *xmass, /* AB: new variable */
double *xlow, double *xhigh,
double *y, int *ny)
{
double fx, xdelta, xmi, xpos; /* AB */
int i, ix, ixmax, ixmin;
ixmin = 0;
ixmax = *ny - 2;
/* AB: line deleted */
xdelta = (*xhigh - *xlow) / (*ny - 1);
for(i=0; i < *ny ; i++)
y[i] = 0;
for(i=0; i < *nx ; i++) {
if(R_FINITE(x[i])) {
xpos = (x[i] - *xlow) / xdelta;
ix = floor(xpos);
fx = xpos - ix;
xmi = xmass[i]; /* AB: new line */
if(ixmin <= ix && ix <= ixmax) {
y[ix] += (1 - fx) * xmi; /* AB */
y[ix + 1] += fx * xmi; /* AB */
}
else if(ix == -1) {
y[0] += fx * xmi; /* AB */
}
else if(ix == ixmax + 1) {
y[ix] += (1 - fx) * xmi; /* AB */
}
}
}
/* AB: lines deleted */
}