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How do I convert a field name into a variable name in a script?

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Alexander
Alexander 2023-11-22
编辑： Stephen23 2023-11-22
I've loaded a matfile structure with unknown fields and want to write a script that processes the data in the fields.
>> S = load('matfile.mat');
>> fields = fieldnames(S)
fields =
1×1 cell array
{'InterestingStuff'}
InterestingStuff is an array of doubles. To access it not knowing the field name,
fields{1}(1,1)
for instance doesn't work, neither does
string(fields{1})(1,1)
What can I use in a script?
  1 个评论
Stephen23
Stephen23 2023-11-22
编辑：Stephen23 2023-11-22
So you are using a structure but don't know how to define the fieldname dynamically... a good place to start is to simply open the STRUCT documentation:
https://www.mathworks.com/help/matlab/ref/struct.html
and then scroll to the bottom where you will find lists of related functions and articles, like this one:
https://www.mathworks.com/help/matlab/matlab_prog/generate-field-names-from-variables.html

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采纳的回答

Walter Roberson
Walter Roberson 2023-11-22
S.(fields{1})
That is, structure (or object) name, then "." then ( then an expression that evaluates to a character vector or string scalar, then )

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