What is an alternative for 'extractBefore' in MATLAB 2015b

The function "extractBefore" does not suit the MATLAB 2015b and it shows an error of, Undefined function or variable 'extractBefore'.

Answer 1

[Manikanta Aditya]

Hi Kavin,

As per my understanding, you want to get an alternative for ‘extractBefore’ function in MATLAB 2015b.

The ‘extractBefore’ function was introduced in MATLAB R2016b and is not available in earlier versions such as MATLAB 2015b. If you are using MATLAB 2015b and need to extract a substring before a specific character or set of characters, as a workaround, you can use the ‘strfind’ function instead, to find the indexes. Using these indexes, you can slice the substrings from your string.

For further reference, please check this link to know more about ‘strfind’ function:

https://www.mathworks.com/help/matlab/ref/strfind.html

I hope this resolves the issue you are facing.

Answer 2

[Image Analyst]

Try it this way

str = 'Image Analyst, Image Analyst';
indexes = strfind(str, 'Analyst')

indexes = 1×2

7 22

extractedBeforeString = str(1:indexes(1) - 1)

extractedBeforeString = 'Image '

extractedAfterString = str(indexes(1) : end)

extractedAfterString = 'Analyst, Image Analyst'