MATLAB: How to search for substrings in a string

Question

Hello,

I have a string ->

1583_pwer_exp_Exxxx_aqxxx_tqx_K2_vxxx_K101_ 

This string contains a substring (bold part – K1001) -> 1583_pwer_exp_Exxxx_aqxxx_tqx_K2_vxxx_K1001_

Letter K + an arbitrary (random) 4-digit number. I want to write out this 4 digit number.

Thx. 🙂

Here is my code:

my_strings="1583_pwer_exp_Exxxx_aqxxx_tqx_K2_vxxx_K1001_ "
tmp = regexp(my_strings,'(?<=_K)\d+','match','once');

Answer 1

You can specify that you want exactly 4 digits after '_K'

my_strings = '1583_pwer_exp_Exxxx_aqxxx_tqx_K2_vxxx_K1001_'
tmp = regexp(my_strings,'(?<=_K)\d{4}', 'match','once');