Error with "input" function

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lucie
lucie on 21 Oct 2022
Commented: lucie on 27 Oct 2022
Hello,
I am writing a quite simple code with MATLAB R2012b for an experiment and one of the first thing I want to do is to register the code of my 2 participants.
To do so, I wrote
>> codeA = input('Code of the first participant: ', 's');
>> codeB = input('Code of the second participant: ', 's');
When I run the code, it effectively asks me to enter the participant's code, but when I try to register this code, it gives me the following error (if 'x' was a participant's code) :
Undefined function or variable 'x'.
Do you have an idea of what could cause this kind of error in this case? It surprises me as it is one of the first lines of my code and as it is not a complex function.
Thanks,
  1 Comment
Jan
Jan on 21 Oct 2022
Please post the complete error message, this means all of the red text. What does this mean: "but when I try to register this code"?
Are you sure that you run this code?

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Accepted Answer

Matt
Matt on 21 Oct 2022
Edited: Matt on 21 Oct 2022
The function
codeA = input('Code of the first participant: ', 's');
creates a string variable in your environnement called codeA. So if you type this function and input 'x' as an answer there are no variable x creater : only a variable of name codeA that is a string with codeA = 'x';
% try this :
codeA = input('Code of the first participant: ', 's');
%type x in your keyboard
x
% you will see an error. Now try
codeA = input('Code of the first participant: ', 's');
% type x in your keyboard
codeA
% you should see 'x' printed
  1 Comment
lucie
lucie on 27 Oct 2022
It worked perfectly, thank you !

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