Hi all,
I have thousands of strings like these ones:
"1159_1; YP_177963; PPE FAMILY PROTEIN"
"1100_13; SECRETED L-ALANINE DEHYDROGENASE ALD CAA15575"
"1141_24; gi;2894249;emb;CAA17111.1; PROBABLE ISOCITRATE DEHYDROGENASE"
and various others..
I'm interested to extract the code for the protein (in this example: YP_177963,
CAA15575, CAA17111).
I found only one common criterion to identify the protein codes in ALL my
strings:
I need a sequence of characters selected in this way:
start:
the first alphabetic capital letter followed after three characters by a digit
end:
the last following digit before a non-digit character, or nothing.
Tricky, isn't it?
Well, I'm not an expert, and I played a lot with regular expressions and sub()
command with no big results. Also with substring.location in Hmisc package (but
here I don't know how to use regular expressions).
Maybe there are other more useful functions or maybe is just a matter to use
regular expression in a better way...
Can anybody help me?
Thanks a lot in advance...
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