I am trying to use the regular expression feature from TexStudio but somehow I can't get it to work and i couldn't find an example or an explanation in the manual.
I am trying to replace variables y1,y2,y3
(y1) with x_1,x_2,x_3
(x_1). In the tip from 'Reg' it is mentioned that 'You can use \1 to \9 in the replace text to insert a submatch.'
I tried to Replace it like this but now everything is replaced with (x_\1) and not the corresponding number. What am I doing wrong?
In adddition: is there a regular expression for all numbers? (1 as well as 1999) For letters there is [A-Z], but [0-9999] only gets the first digit marked.
Thank You!
Best Answer
You need to use capture groups in order for the
\1
to work.should work. You can check what is being replaced with the little preview text after the
\1
button.Also,
\d
characters are digits, then+
just means 1 or more.