Hi,
If I have a string of consecutive chars followed by consecutive numbers and then chars, like "absdfds0213451ab", how to separate the consecutive chars from consecutive numbers?

grep doesn't seem to be helpful

grep("[a-z]","absdfds0213451ab", ignore.case=T)
[1] 1


 grep("[0-9]","absdfds0213451ab", ignore.case=T)
[1] 1

Thanks

Carol
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