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I know this is a long shot, but I have a huge text file and I need to add a given number to other numbers matching some criteria.
Eg.
identifying text 1.1200
identifying text 1.1400
and I'd like to transform this (by adding say 1.15) to
identifying text 2.2700
identifying text 2.2900
Normally I'd do this in Python, but it's on a Windows machine where I can't install too many things. I've got Vim though :)
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Basic Find and Replace In Vim, you can find and replace text using the :substitute ( :s ) command. To run commands in Vim, you must be in normal mode, the default mode when starting the editor. To go back to normal mode from any other mode, just press the 'Esc' key.
Search for text using / or for a word using * . In normal mode, type cgn (change the next search hit) then immediately type the replacement. Press Esc to finish. From normal mode, search for the next occurrence that you want to replace ( n ) and press . to repeat the last change.
Here is a simplification and a fix on hobbs' solution:
:%s/identifying text \zs\d\+\(.\d\+\)\=/\=(1.15+str2float(submatch(0)))/
Thanks to \zs, there is no need to recall the leading text. Thanks to str2float() a single addition is done on the whole number (in other words, 1.15 + 2.87 will give the expected result, 4.02, and not 3.102).
Of course this solution requires a recent version of Vim (7.3?)
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