I have the following list that I want to break on the digit. For example:
From:
103Ru
103mRh
104
1041
To:
103
Ru
103
mRh
104
1041
I would like to use Regx with sed or maybe awk in order to achieve this result. But most of my approaches failed. I need some advice or possibly some solution. Thanks
$ sed -r 's/([0-9])([^0-9])/1
2/g' filename
103
Ru
103
mRh
104
1041
The above regex looks for a number followed by not a number. If found, it inserts a newline between them.
In more detail, sed commands of the form s/old/new/ look for old and replace it with new. In our case, old consists of two characters: ([0-9]) matches any number and, because it is enclosed in parens, it saves the value. ([^0-9]) matches anything other than a number and saves it also. Those two characters, if found, are replaced with 1 which means the first match (the number), a newline, and the second match (not-a-number).
2
MORE: If we want to break at the beginnings of numbers as well as at the end, then we add one more substitution command:
$ echo xyz541wpk | sed -r 's/([0-9])([^0-9])/1
2/g; s/([^0-9])([0-9])/1
2/g'
xyz
541
wpk
The second substitution command is just like the first but it looks for the reverse pattern: not-a-number followed by a number.
