MATLAB: Simple Use of Strings

use of strings

I am simply trying to get through a Tutorial online and am having a problem running a simple string. It is returning the error:Undefined function 'string' for input arguments of type 'char'.

I am typing: >> a = string('Hi how are you') Undefined function 'string' for input arguments of type 'char'.

This is my first time using MatLab. Do I have to engage this feature to use it? I am pretty sure I have it typed in correctly.

Best Answer

Your version of MATLAB does not support the string class.

"String arrays were introduced in R2016b":

source: https://www.mathworks.com/help/matlab/matlab_prog/create-string-arrays.html

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MATLAB: Undefined function ‘contains’ for input arguments of type ‘char’

Are you using an older version of MATLAB? According to the documentation for contains, this function was introduced in version R2016b.

You might be able to use strfind instead.

MATLAB: Find index for mx1 cell with specific string

For comparing a cell array of char vectors and a char vector you have to use strcmp, or strcmpi, or strncmp, etc:

idx = strcmp(A.Scenario,'Scenario 20')

The == operator only works for string arrays:

https://www.mathworks.com/help/matlab/matlab_prog/create-string-arrays.html

Do not confuse character vectors or character arrays with string arrays:

https://www.mathworks.com/help/matlab/characters-and-strings.html

Best Answer

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