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
|
subroutine ext12f(neq, t, y, ydot)
c -------------------------------------------
c same example with call to cmatptr
c param must be defined as a scilab variable
c exemple with a call to cmatptr function
c -->param=[0.04,10000,3d+7];
c -->link('ext12f.o','ext12f')
c -->y=ode([1;0;0],0,[0.4,4],'ext12f')
c Copyright INRIA
double precision t, y, ydot
logical cmatptr
dimension y(3), ydot(3)
c
include '../../routines/stack.h'
c
c If variable 'param' exists gets its pointer in
c internal stack else return
if(.not.cmatptr('param'//char(0),m,n,lp)) return
c ********************************
c param entries are in stk(lp),stk(lp+1),stk(lp+2)
c i.e. param(1)= stk(lp), ...
c m,n = dimensions of param = 3,1 (or 1,3 if row v.)
c (note that vector param not used in this example)
ydot(1) = -stk(lp)*y(1) + stk(lp+1)*y(2)*y(3)
ydot(3) = stk(lp+2)*y(2)*y(2)
ydot(2) = -ydot(1) - ydot(3)
return
end
|
