Well, it needs to be done a character at a time, so, I am not entirely sure
that
replace ("ACTG","TGAC", "all") would work in all cases.
However, Barney's solution is quite elegant!
TNX to both of you for helping with a common genomics transformation.
Rick.
-----Original Message-----
From: Claude Schneegans [mailto:[EMAIL PROTECTED]
Sent: Tuesday, June 14, 2005 11:56 AM
To: CF-Talk
Subject: Re: reverse compliment a sequence
>I need to to reverse compliment a nucleotide sequence, so
>C become a G
>G becomes a C
>A becomes a T
>T becomes an A
>I need to go through a string a character at a time and build a new string.
>So:
>"ACTG" becomes "TGAC"
At first sight, simply
replace ("ACTG","TGAC", "all")
should do it, but I suspect the problem to be a little more complex, can you
give us more detail (may be a link) about what a "nucleotide sequence" may
look like?
--
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