matlab图形保存及图例的设置和函数

图形的保存的步骤：figure——edit——copy figure

例1：x=[0,0.48,0.84,1,0.91,0.6,0.14];

subplot(2,2,1)

>> plot(x)

>> hold on

>> subplot(2,2,2)

>> plot(x,'*')

>> subplot(2,2,3)

>> plot(x,'-b*')

>> subplot(2,2,4)

>> plot(x,'-k*')

10.80.60.40.200246810.80.60.40.2002468x=0:0.01:2*pi;

>> y1=sin(x);

>> y2=cos(x);

>> plot(x,y1,'b',x,y2,'r')

>> legend('正弦曲线','余弦曲线')

>> title('正弦与余弦曲线')

>> xlabel('x')

10.80.60.40.200246810.80.60.40.2002468

>> ylabel('y')

正弦与余弦曲线10.80.60.40.20-0.2-0.4-0.6-0.8-10123x4567正弦曲线余弦曲线y

>> x=-5:5

x =

Columns 1 through 9

-5 -4 -3 -2 -1 0 1 2 3

Columns 10 through 11

4 5

>> y=x

y =

Columns 1 through 9

-5 -4 -3 -2 Columns 10 through 11 4 5

>> [X,Y]=meshgrid(x,y)

X =

Columns 1 through 9

-5 -4 -3 -2 -5 -4 -3 -2 -5 -4 -3 -2 -5 -4 -3 -2

-1 0 -1 0 -1 0 -1 0 -1 0 2 2 2 2 2 3

3

3

3

3

1

1 1 1 1

-5 -4 -3 -2 -1 0 1 2 3

-5 -4 -3 -2 -1 0 1 2 3

-5 -4 -3 -2 -1 0 1 2 3

-5 -4 -3 -2 -5 -4 -3 -2 -5 -4 -3 -2 -5 -4 -3 -2 Columns 10 through 11 4 5

4 5

4 5

4 5

4 5

-1 0 -1 0 -1 0 -1 0 2 2 2 2 3

3

3

3

1 1 1 1

4 5

4 5

4 5

4 5

4 5

4 5

Y =

Columns 1 through 9 -5 -5 -5 -5 -4 -4 -4 -4 -3 -3 -3 -3 -2 -2 -2 -2 -1 -1 -1 -1 -5 -5 -4 -4 -3 -3 -2 -2 -1 -1

-5 -5 -4 -4 -3 -3 -2 -2 -1 -1 -5

-4

-3

-2

-1

0 0 0 0 0 0 0 0 0

1 1 1 1 1 1 1 1 1

2 2 2 2 2 2 2 2 2

3 3 3 3 4 4 4 4 5 5 5 5 Columns 10 through 11 -5 -5

-4 -4

-3 -3

-2 -2

-1 -1

0 0

3 3 4 4 5 5 3 3 4 4 5 5 3

4

5

1 1

2 2

3 3

4 4

5 5

>> z=X.^2+Y.^2

z =

Columns 1 through 8

50 41 34 29 41 32 25 20 34 25 18 13 29 20 13 8 26 17 10 5

26 25 17 16 10 9 5 4 2 1 26 29

17 20

13

5 8

2 5

10

25 16 9 4 1 0 1 4

26 17 10 5 2 1 2 5

29 20 13 8 5 4 5 8

34 25 18 13 41 32 25 20 50 41 34 29 Columns 9 through 11

34 41 50

25 32 41

18 25 34

13 20 29

10 17 26

9 16 25

10 9 17 16 26 25 13

17 20

26 29

10

10 17 26

13 20 29

18 25 34

25 32 41

34 41 50

>> mesh(X,Y,z)

三位曲线图

50403020100550-5-50

>> surf(X,Y,z)

三维曲面绘图函数

50403020100550-5-50