What I would probably do is along these lines:
iddf <- data.frame(Sample.id=names(Prot.amount), new.id=Prot.amount[1,])
newNAD <- merge( NAD, iddf)
This is not tested, but it looks right to me,
assuming I understand the structure of what
you're trying to do.
I'm also assuming that NAD has more than three
rows, and that Prot.amount has as many columns as
NAD has rows. And that you just showed us the
first three rows of NAD and first three columns
of Prot.amount in order to keep the email simple.
One final note ... if Prot.amount is an object
within R, it is *not* a file. You may have read
it in from a file, of course, but it isn't a file
inside R. I'm assuming it's a dataframe.
-Don
At 1:18 PM +0300 9/19/09, Monna Nygård wrote:
Hi,
This is a question of a newbie getting into the exciting world of R.
I have several dataframes in the same format as NAD:
NAD[1:3,1:3]
Sample.Id Main.abs..1 Main.abs..2
148 10a 0.04836 0.04994
167 11a_1109 0.32245 0.36541
173 11b_1109 0.29293 0.32815
What I want to do is to replace the Sample.Id
with a corresponding number.The number i have in
another file,called Prot.amount
Prot.amount[1:3,1]
10a 11a_1109 11b_1109
15.516 38.248 42.297
row.names(NAD)<-(NAD[,1])
NAD$Sample.Id <- replace(NAD$Sample.Id,
NAD$Sample.Id=="10a",Prot.amount["10a",1])
NAD[1:3,1:3]
Sample.Id Main.abs..1 Main.abs..2
10a 15.516 0.04836 0.04994
11a_1109 11a_1109 0.32245 0.36541
11b_1109 11b_1109 0.29293 0.32815
So what I have tried to do is to write a
function that would allow me to replace the
values automatically of all dataframes. This I
just can't get to work.
Thank you so much in advance!
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--
---------------------------------
Don MacQueen
Lawrence Livermore National Laboratory
Livermore, CA, USA
925-423-1062
m...@llnl.gov
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