blob: 62802f770ffdeb9660aaafc558e0ae86125c353d (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
|
/* 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: Mushir
Organization: FOSSEE, IIT Bombay
Email: toolbox@scilab.in
*/
#include <math.h>
#include <stdlib.h>
#include "logspace.h"
void dlogspacea(double *low_limit,int _row,double *up_limit,double range_num,double *out)
{
int i,j,k;
double temp;
double *step_iterate; /* for each row the spacing between two values is different.*/
step_iterate = (double*) malloc((double)_row*sizeof(double));
for(i=0;i<_row;i++)
{
step_iterate[i] = pow(10,((up_limit[i]-low_limit[i])/(range_num-1)));
}
for(j=0;j < _row;j++)
{
out[j] = pow(10,low_limit[j]); /* For every row first element is equal to 10 raise to the first value of low_limit array*/
temp = out[j];
for(k=1;k < (double)range_num;k++ )
{
out[(_row*k)+j] = temp*step_iterate[j]; /* Output matrix positions for 3 X 5 matrix are [0 3 6 9 12;1 4 7 10 13;2 5 8 11 14] so (_row*k)+j) used*/
temp = out[(_row*k)+j];
if(k == (double)range_num-1 )
{
out[(_row*k)+j] = pow(10,((double)up_limit[j])); /* For every row Last value of output is equal to 10 raise to first value of up_limit array*/
}
}
}
}
|
