Using Matfile() in combination with a variable

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Jan Majewski
Jan Majewski 2018-11-21
编辑： Jan Majewski 2018-11-22
I reference a Matfile and to access its entries using a variable:
a = 'variablefrommat';
m = matfile('myMat.mat');
x = m.a
This results (obviously) in Matlab searching the Matfile for 'a'. In my case this error occurs:
'a' does not exist in 'myMat.mat'.
Is there a way to interpret 'a' as the variable?

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采纳的回答

Adam Danz
Adam Danz 2018-11-21
编辑：Adam Danz 2018-11-21
The mat file object is similar to a structure array. Use parentheses to access fields dynamically.
m = matfile('myMat.mat');
a = 'variablefrommat';
x = m.(a) %same as m.variablefrommat

更多回答（1 个）

Geoff Hayes
Geoff Hayes 2018-11-21
Jan - if you know the name of the variable that you want to reference then why are you setting this to its own variable? What are you trying to accomplish here?
You can do this using getfield as
x = getfield(m,a)
which will return the expected result...but do you need to do it this way?
  1 个评论
Jan Majewski
Jan Majewski 2018-11-22
编辑：Jan Majewski 2018-11-22
I have a function which executes it since i have a lot variables and wanted to organize it better.
Maybe should have added it in the Question.
Your solution works aswell! Thanks.

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