Appropriate imput for dynamic structure field name

6 次查看（过去 30 天）
Jessica Angulo Capel
评论： Steven Lord 2020-4-22
Hello,
I am trying to create a dynamic field name to a structe with the dot notation. I.e. I have a for loop with a string variable that changes in each iteration, and I want to create a field with that string name in each of the iterations.
msd = struct;
for i = 1:NFiles %for each file
FileName = Track_file{i,1}.File(1);
msd.(FileName) = []; %mal
end
The variable FileName is a string, but it keeps giving me an error: Invalid field name: 'Z:\Documents\Data\Sec1 vesicles\Spots in tracks statistics.csv'.
I also tried with:
msd.(FileName{1}) = [];
but the error is the same.
Why is it an invalid field name? which class of variable should I use as an imput?
Thank you very much!!!

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Rik
Rik 2020-4-22
Field names in matlab adhere to the same rules as variable names. They can't start with a digit and can only contain 0-9, a-z, A-Z, and underscores.
Since Z:\Documents\Data\Sec1 vesicles\Spots in tracks statistics.csv is not a valid variable name, it can't be a field name. You will have to store that file name in a different way.
  2 个评论
Jessica Angulo Capel
Jessica Angulo Capel 2020-4-22
Thank you very much!
I was so convinced it had to be a problem with the imput variable type that I didn't think of that. So simple!
Steven Lord
Steven Lord 2020-4-22
You could try converting that variable name to a valid identifier using matlab.lang.makeValidName. Alternately if you're using release R2019b or later you could make a table with a variable name that's not a valid MATLAB identifier.

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