strsplit for input type char not working

I have a string and I want split it where it has underscore. But its showing an error. Error says "Undefined function 'strsplit' for input arguments of type 'char'.". Find here attached snap shot of what I am trying to achieve.

Answer 1

[Walter Roberson]

Introduced in R2013a and you are probably using an earlier version.

You may wish to use http://www.mathworks.com/matlabcentral/fileexchange/21710-string-toolkits/content/strings/strsplit.m

[Praveen Choudhury]

Thank you :)