subplot(2,2,2),plot(sin(5*x),cos(2*x+0.2))
subplot(2,2,3), plot(x,sin(x)^2)
subplot(2,2,4), plot(x,sin(x)^3)
. 3.1.
. 3.1. subplot
1.
.
1. figure(1).
2. X, 2 5 0.01 ( ).
3. Y, ( ).
4. plot , .
.figure(1)X=2:0.01:5Y=atan(X)./(1+sin(X).^2)plot(X,Y) |
3.2.
3.2
1. | 2. | ||||||
3. | -3 | 4. | -1 | ||||
5. | 6. | ||||||
7. | -2 | 8. | |||||
9. | 10. | ||||||
11. | 12. | ||||||
13. | 14. | -1 | |||||
15. | 16. | -1 | |||||
17. | -1,5 | 1,5 | 18. | ||||
19. | -2 | 20. |
2.
. , , , , , .
1 | 2 | ||||
1. figure(1).
2. X, 2 5 0.1 ( ).
3. Y, ( ).
4. X1, 2 4 0.1 ( ).
5. Y1, .
6. plot , , (, '--rx' ). 7. , , .figure(1)X=2:0.1:5Y=3*cos(X)./(1+sin(X).^2)X1=2:0.1:4Y1=(1+sqrt(2.5*X1))./(0.2+cos(X1).^2)plot(X,Y,'--rx',X1,Y1,'-.k+')xgrid ()xtitle(" "," "," ")legend("Y(X)"," Y1(X1)") |
3.3.
|
|
3.3
1 | 2 | |||||
1. | ||||||
2. | -3 | -1 | ||||
3. | ||||||
4. | -2 | |||||
5. | ||||||
6. | ||||||
7. | -1 | |||||
8. | -1 | |||||
9. | -1,5 | 1,5 | ||||
10. | -2 | |||||
11. | ||||||
12. | -2 | |||||
13. | -2 | -1 | ||||
14. | -1 | |||||
15. | -3 |
3. -
. - , , .
1. figure(1).
2. X, -4 4 0.1 ( ).
3. , , i. , , if.
4. plot , .
figure(1)X=-4:0.1:4, i=1while i<=length(X) if X(i)>2 then y=sqrt(X(i)), elseif (X(i)>=-1) & (X(i)<=2) then y=X(i)^2 else y=4*sin(X(i)) end Y(i)=y i=i+1endplot(X,Y,'-bx'), xgrid () |
2.7.