Anyone know the error checking for special characters

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Hello there, I've been at this for a while now but i just can't seem to to find the error check for special characters like, * @!. Please help
Vivie on 27 Apr 2015
i'm writing a simple program that asks the user to enter variables but i'd like to error check it so it's not easily crushed. I've used error checks like isinf, is numeric, isreal. I would like to send the program into a loop should the user use special characters. Does that help.

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Answers (1)

Udit Gupta
Udit Gupta on 27 Apr 2015
You can use regular expressions. The code will go something like this -
if any(regexp(str,'[^_a-zA-Z0-9]+'))
<error condition>
You will need to use a more sophisticated regEx format if you need more robust checking. Like:
if any(regexp(str,'^[a-zA-Z_][a-zA-Z0-9_]*$'))


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