- , , =0.58.
. 2.2.1-5. =0.58
. 2.2.1-6 2.2.1-7 , .
. 2.2.2-6.
. 2.2.2-7.
,
1) Matlab.
2) , , polyfit ().
3) , - interp1().
4) .
5) .
1) 2.2. (. 2.2.1).
2) : . 2.2.2-1; . 2.2.2-2.
3) .
4) , polyfit() .
5) , , , .
6) , .
7) interp1(), . , , .
8) , .
9) , .
10) clear all.
11) .
3.
2.2.2-1
xi | ||
1 3 5 7 9 10 13 | ||
1 2 4 5 7 10 12 | ||
1 3 6 7 10 11 13 | ||
1 2 4 7 9 11 13 | ||
3 6 7 9 10 11 12 | ||
2 3 6 8 9 10 13 | ||
1 4 5 7 9 11 12 | ||
1 2 4 7 9 12 13 | ||
2 3 5 7 8 11 12 | ||
1 3 6 7 9 10 13 | ||
1 3 7 8 10 11 13 | ||
1 2 5 6 7 10 12 | ||
1 4 5 8 10 12 13 | ||
1 3 5 7 9 10 13 | ||
1 3 6 7 8 10 13 | ||
1 4 5 7 9 11 12 | ||
2 4 5 6 8 12 13 | ||
1 4 5 7 9 11 12 | ||
1 4 5 8 10 11 12 | ||
2 4 5 6 8 12 13 | ||
1 4 5 8 10 12 13 | ||
2 3 6 8 9 10 13 | ||
1 3 5 8 10 12 13 | ||
1 4 5 7 9 11 12 | ||
2 4 5 6 8 12 13 | ||
3 4 5 7 8 9 12 | ||
3 5 8 10 11 12 13 | ||
2 4 7 9 10 11 13 | ||
2 4 5 7 8 10 12 | ||
1 4 5 7 9 11 13 |
|
|
2.2.2-2
i | xi | |||
-5 | 1.38 | 2.44 | 1.676 | |
-4.5 | 1.221 | 2.359 | 2.025 | |
-4 | 1.511 | 1.751 | 1.736 | |
-3.5 | 1.501 | 2.13 | 1.203 | |
-3 | 1.455 | 1.511 | ||
-2.5 | 0.728 | 1.482 | 1.362 | |
-2 | 0.976 | 1.437 | 0.75 | |
-1.5 | 1.065 | 0.803 | 0.976 | |
-1 | 0.599 | 1.175 | 0.957 | |
-0.5 | 0.192 | 0.49 | 0.272 | |
0.3 | 0.375 | 0.3 | ||
0.5 | 0.319 | -6.51*10-3 | 0.165 | |
-0.405 | -1.965 | -1.185 |
1) :
,
2) () Command Window, .
1) ?
2) ?
3) polyfit()?
4) polyfit()?
5) polyval()?
6) interp1()?
7) interp1()?
2.3.
MatLab
2.3.1.
2.3.2.
MatLab
2.3.3.
2.3.1.
F(x) , f(x) (xi yi, i = 1, 2, , n). .
. , .
, , . , , , , .
:
:
h ;
yi xi, k=0, 1, ,n;
n a, b.
:
:
h ;
y0 = a;
yn = b;
:
|
|
Matlab int(), :
int(S) S , findsym(). S , ''.
int(S, v) S v.
int(S, a, b) S b, , .
int(S, v, a, b) S v b.
Matlab int()
(. 2.3.1-1).
. 2.3.1-1.
MatLab , . .
MatLab trapz(x,y). y(x), . y(x) , . - trapz(y), x y (x=1:length(y)), y. , x , .
(. 2.3.1-2).
. 2.3.1-2.
Matlab trapz()
MatLab quad(). , .
q=quad('f',a,b), f , , .
. 2.3.1-3.
quad()
eps : q=quad('f', a, b, eps ). eps =10-6.
Matlab quad() (. 2.3.1-3).