MATLAB: MATLAB invalid field name

field namestruct

Hello, I am trying to create the following structure
data2.TEST.('MY/FIELD')=100
receiving the following error
Invalid field name: 'MY/FIELD'
I guess the error is related to the use of "/" character in the field name. Any suggestion about how to solve this and maintain the field name with "/" ?
thank you P

Best Answer

Field names in MATLAB struct arrays must satisfy three of the four criteria of a valid variable name as listed in the help for the isvarname function. They must:
  1. start with a letter, otherwise assigning to that field will error
  2. contain only letters, numbers, and/or the underscore character, otherwise assigning to that field will error, and
  3. must be no longer than namelengthmax (currently 63) characters, otherwise you will receive a warning and the field name will be truncated
It is possible to assign to a field whose name is a keyword, though I would advise against it unless absolutely necessary. And trying to save that struct with the -struct option probably won't work, or if it does trying to load that MAT-file will likely cause a headache for you in the future.
S = struct;
S.end = 42
To convert your potential field name into one that is valid, consider using matlab.lang.makeValidName and potentially matlab.lang.makeUniqueStrings.
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