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separate matrices out of struct

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Rightia Rollmann
Rightia Rollmann 2017-1-11
评论： Stephen23 2017-1-11
I have a struct having matrices of B1, B2, and B3. I want to make three separate matrices out of them available in the Workspace automatically with the help of a loop. How?
S = struct('B1',[1 2;3 4],'B2', [5 6; 7 8], 'B3', [9 10; 11 12] )
  1 个评论
Stephen23
Stephen23 2017-1-11
"I want to make three separate matrices out of them available in the Workspace automatically with the help of a loop"
Here is why that would be a very bad idea:
https://www.mathworks.com/matlabcentral/answers/304528-tutorial-why-variables-should-not-be-named-dynamically-eval

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采纳的回答

Jos (10584)
Jos (10584) 2017-1-11
Why? Apparently the three matrices are related. Keeping them in a single struct shows this relationship. If you need to access one of them you can easily do this using assignment operations
X = S.B1
or dynamically
k = 2
field = sprintf('B%d',k)
X = S.(field)

更多回答（1 个）

Rightia Rollmann
Rightia Rollmann 2017-1-11
Thanks, man! You not just answered it, but perfected the question too!

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