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csparse
cs_norm.c
Go to the documentation of this file.
1
#include "
cs.h
"
2
/* 1-norm of a sparse matrix = max (sum (abs (A))), largest column sum */
3
double
cs_norm
(
const
cs
*
A
)
4
{
5
int
p, j, n, *Ap ;
6
double
*Ax, norm = 0, s ;
7
if
(!
CS_CSC
(A) || !A->
x
)
return
(-1) ;
/* check inputs */
8
n = A->
n
; Ap = A->
p
; Ax = A->
x
;
9
for
(j = 0 ; j < n ; j++)
10
{
11
for
(s = 0, p = Ap [j] ; p < Ap [j+1] ; p++) s += fabs (Ax [p]) ;
12
norm =
CS_MAX
(norm, s) ;
13
}
14
return
(norm) ;
15
}
example1.A
A
Definition:
example1.py:34
cs_sparse::n
int n
Definition:
cs.h:20
cs_norm
double cs_norm(const cs *A)
Definition:
cs_norm.c:3
CS_MAX
#define CS_MAX(a, b)
Definition:
cs.h:134
cs.h
CS_CSC
#define CS_CSC(A)
Definition:
cs.h:140
cs_sparse::p
int * p
Definition:
cs.h:21
cs_sparse
Definition:
cs.h:16
cs_sparse::x
double * x
Definition:
cs.h:23
acado
Author(s): Milan Vukov, Rien Quirynen
autogenerated on Mon Jun 10 2019 12:34:31