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
|
#include <octave/oct.h>
DEFUN_DLD (mtt_euler, args, ,
"euler integration method")
{
#ifdef OCTAVE_DEV
ColumnVector x = args(0).column_vector_value ();
const ColumnVector dx = args(1).column_vector_value ();
const double ddt = args(2).double_value ();
const int Nx = static_cast<int> (args(3).double_value ());
const ColumnVector openx = args(4).column_vector_value ();
#else
const ColumnVector x = args(0).vector_value ();
const ColumnVector dx = args(1).vector_value ();
const double ddt = args(2).double_value ();
const int Nx = static_cast<int> (args(3).double_value ());
const ColumnVector openx = args(4).vector_value ();
#endif
register int i, n;
n = Nx;
for (i = 0; i < Nx; i++)
{
if (0 != openx (i))
{
x (i) = 0.0;
}
else
{
x (i) += dx (i) * ddt;
}
}
|
>
>
>
>
>
>
>
>
|
|
|
|
>
|
>
>
>
|
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
|
#include <octave/oct.h>
#ifdef STANDALONE
ColumnVector Fmtt_euler ( ColumnVector &x,
const ColumnVector &dx,
const double &ddt,
const int &Nx,
const ColumnVector &openx)
{
#else // !STANDALONE
DEFUN_DLD (mtt_euler, args, ,
"euler integration method")
{
#ifdef OCTAVE_DEV
static ColumnVector x = args(0).column_vector_value ();
const ColumnVector dx = args(1).column_vector_value ();
const double ddt = args(2).double_value ();
const int Nx = static_cast<int> (args(3).double_value ());
const ColumnVector openx = args(4).column_vector_value ();
#else // !OCTAVE_DEV
static ColumnVector x = args(0).vector_value ();
const ColumnVector dx = args(1).vector_value ();
const double ddt = args(2).double_value ();
const int Nx = static_cast<int> (args(3).double_value ());
const ColumnVector openx = args(4).vector_value ();
#endif // OCTAVE_DEV
#endif // STANDALONE
register int i, n;
n = Nx;
for (i = 0; i < Nx; i++)
{
if (0 != openx (i))
{
x (i) = 0.0;
}
else
{
x (i) += dx (i) * ddt;
}
}
#ifdef STANDALONE
return x;
#else // !STANDALONE
return octave_value (x);
#endif // STANDALONE
}
|