MATLAB invalid field name

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

Answer 1

[Steven Lord]

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.

Answer 2

[dpb]

" how to solve this and maintain the field name with "/" ?"

No can do. The '/' is simply not an allowable character in a variable/field name and there's no getting around it. Use something else.