How to use the value of a variable as a variable?

Question

Justin Callahan 2012-10-22

0
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/51553-how-to-use-the-value-of-a-variable-as-a-variable

I will try to describe this the best I can. I have a variable A and its value is a string, lets say BC.

A = BC;

The value of A (BC in this case) is determined within a loop and changes. However, I want string BC to be turned into a variable where I can save more information. Specifically I want BC to be turned into a matrix that I can use later on.

Anyone have any tips on how I can do this?

Thank you for your time.

0 个评论
显示 -2更早的评论隐藏 -2更早的评论

请先登录，再进行评论。

请先登录，再回答此问题。

Answer 1

owr 2012-10-22

1
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/51553-how-to-use-the-value-of-a-variable-as-a-variable#answer_62831

编辑：owr 2012-10-22

在 MATLAB Online 中打开

You could use a structure and define fields indirectly using the current value of "A":

>> A = 'BC'
A =
BC
>> s.(A) = randn(3,3)
s = 
      BC: [3x3 double]
>> A = 'CD'
A =
CD
>> s.(A) = randn(4,4)
s = 
      BC: [3x3 double]
      CD: [4x4 double]

You can access the fields using the dynamically defined names:

>> s.BC
ans =
      1.4090   -1.2075    0.4889
      1.4172    0.7172    1.0347
      0.6715    1.6302    0.7269
>> s.CD
ans =
     -0.3034   -1.1471    1.4384   -1.7115
      0.2939   -1.0689    0.3252   -0.1022
     -0.7873   -0.8095   -0.7549   -0.2414
      0.8884   -2.9443    1.3703    0.3192