Reguarding 'assignin' acceptable name for variable.

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Robert
Robert 2017-7-14
评论： Walter Roberson 2019-5-4
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.
  2 个评论
Stephen23
Stephen23 2017-7-14
编辑：Stephen23 2017-7-14
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
Guillaume 2017-7-14
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.

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KSSV
KSSV 2017-7-14
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....
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Steven Lord
Steven Lord 2017-7-14
You can check if a particular identifier is a valid variable name using the isvarname function.
Walter Roberson
Walter Roberson 2019-5-4
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.

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