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cvmul.c
Go to the documentation of this file.
1
/* cvmul.c CCMATH mathematics library source code.
2
*
3
* Copyright (C) 2000 Daniel A. Atkinson All rights reserved.
4
* This code may be redistributed under the terms of the GNU library
5
* public license (LGPL). ( See the lgpl.license file for details.)
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* ------------------------------------------------------------------------
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*/
8
#include "
ccmath.h
"
9
void
cvmul
(
Cpx
* u,
Cpx
* a,
Cpx
* v,
int
n
)
10
{
11
Cpx
*
q
;
12
13
int
i, j;
14
15
for
(i = 0; i <
n
; ++i, ++u) {
16
u->
re
= u->
im
= 0.;
17
for
(j = 0, q = v; j <
n
; ++j, ++a, ++
q
) {
18
u->
re
+= a->re * q->
re
- a->im * q->
im
;
19
u->
im
+= a->im * q->
re
+ a->re * q->
im
;
20
}
21
}
22
}
23
24
Cpx
cvnrm
(
Cpx
* u,
Cpx
* v,
int
n
)
25
{
26
int
k;
27
28
Cpx
z;
29
30
z.
re
= z.
im
= 0.;
31
for
(k = 0; k <
n
; ++k, ++u, ++v) {
32
z.
re
+= u->re * v->
re
+ u->im * v->
im
;
33
z.
im
+= u->re * v->
im
- u->im * v->
re
;
34
}
35
return
z;
36
}
forms.q
tuple q
Definition:
forms.py:2019
cvnrm
Cpx cvnrm(Cpx *u, Cpx *v, int n)
Definition:
cvmul.c:24
ccmath.h
cvmul
void cvmul(Cpx *vp, Cpx *mat, Cpx *v, int n)
Definition:
cvmul.c:9
complex::re
double re
Definition:
ccmath.h:38
complex::im
double im
Definition:
ccmath.h:38
complex
Definition:
ccmath.h:38
n
int n
Definition:
dataquad.c:291
lib
external
ccmath
cvmul.c
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