Question

[MATLAB]将自然数1~20存放到 一个4行5列的矩阵A中，并取出第2列，第3行的元素存入变量B中？

RT

Answer 1

>> x=1:20

x =

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20

>> x=reshape(x,5,4)'

x =

1 2 3 4 5
6 7 8 9 10
11 12 13 14 15
16 17 18 19 20
>> B=[x(:,2)',x(3,:)]

B =

2 7 12 17 11 12 13 14 15

Answer 2

>> X=1:20;
>> A=reshape(X,4,5)

A =

1 5 9 13 17
2 6 10 14 18
3 7 11 15 19
4 8 12 16 20

>> B=A(2,3)

B =

10

Answer 3

b