Xiang Li

1 代码

>> x=-3:3;
>> y=-3:3

y =

    -3    -2    -1     0     1     2     3

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

X =

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


Y =

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

>> Z=X.^2+Y.^2;
>> Z

Z =

    18    13    10     9    10    13    18
    13     8     5     4     5     8    13
    10     5     2     1     2     5    10
     9     4     1     0     1     4     9
    10     5     2     1     2     5    10
    13     8     5     4     5     8    13
    18    13    10     9    10    13    18

>> surf(X,Y,Z)

2 result