regexp to extract the last underscore and the following letter (last letter) from words

I want to use regexp in order to extract only the last underscore and the last letter from the words below.

But if I have the words 'apple_c' and 'apple_man_man_h'

and I use regexp(words,'\_\w','split'),

then I get as a result 'apple' for both words, but it is wrong for me, because I want to extract onlythe last underscore and thr last letter, as I said.

The desired result for me is 'apple' and ''apple_man_man'.

How should i modify the command to achieve this?

Thank you

Answer 1

[Mathieu NOE]

hello

I recognize I am not the regexp expert here , so I would suggest this alternative :

ind = findstr(words,'_');
word_out = words(1:ind(end)-1)

[Ioannis Vourvachakis]

thank you very much!!! If anyone has the kindness to show me how it is done with regexp, out of curiosity, I would appreciate it very much.

[Stephen23]

The behavior if there is no underscore might also be relevant:

words = 'apple';
ind = findstr(words,'_')

ind =

     []

word_out = words(1:ind(end)-1)

Array indices must be positive integers or logical values.

What is the desired output in this case?

[Ioannis Vourvachakis]

Ηello Stephen, we talk about the case that all the words we study now contain an underscose and after the underscore follows the last letter of the word.