Reguarding 'assignin' acceptable name for variable.

Hello everybody,

Quick question, are there any specific characters that give error for 'assignin' in the variable name?

I am asking as the acceptability of a variable name looks random. In the latest trial I tried assigning a variable name as: '280617_SC_Ger' but I got an error. If I change this to 'SCGer_280617' it works.

Any Ideas?

Thank you for your answers!

%% Part of code of interest: assignin('base',sprintf('%s_Raw_Data',varname), output)

%% Error: Error using assignin Invalid variable name "280617_SC_Ger_Raw_Data" in ASSIGNIN.

[Stephen23]

Reading the MATLAB documentation is faster than logging onto some internet forum and asking strangers how basic MATLAB features work:

https://www.mathworks.com/help/matlab/matlab_prog/variable-names.html

You should also avoid magically creating or accessing variable names. Read this to know why:

https://www.mathworks.com/matlabcentral/answers/304528-tutorial-why-variables-should-not-be-named-dynamically-eval

[Guillaume]

More than the variable name, the real issue here is the use of assignin. Usually a good indication that the code is badly designed and very brittle.

On the subject of variable names, very few programming languages allow variable names that start with a number.

Answer 1

[KSSV]

In MATLAB the variable names never start with numbers ...it should be always a character....after character you can use number.

280617_SC_Ger this as a variable name not allowed, because it starts with number...

SCGer_280617 this as a variable name allowed, as it starts with character....

[Robert]

Thank you very much for your quick reply! Regards.

[Steven Lord]

You can check if a particular identifier is a valid variable name using the isvarname function.

[Walter Roberson]

Please start a new Question for this, and post your opt705, and show the code that is calling it -- preferably enough for us to be able to reproduce the problem.