On Nov 3, 2010, at 5:03 PM, Matevž Pavlič wrote:
Hi,
Thanks for the help and the manuals. Will come very handy i am sure.
But regarding the code i don't hink this is what i want....basically
i would like to repeat bellow code :
w1<-table(lit$W1)
w1<-as.data.frame(w1)
It appears you are not reading for meaning. Burns has advised you how
to construct column names and use them in your initial steps. The `$`
function is quite limited in comparison to `[[` , so he was showing
you a method that would be more effective. BTW the as.data.frame step
is unnecessary, since the first thing write.table does is coerce an
object to a data.frame. The "write.table" name is misleading. It
should be "write.data.frame". You cannot really write tables with
write.table.
You would also use:
file=paste(vari, "csv", sep=".") as the file argument to write.table
write.table(w1,file="w1.csv",sep=";",row.names=T, dec=".")
What are these next actions supposed to do after the file is written?
Are you trying to store a group of related "w" objects that will later
be indexed in sequence? If so, then a list would make more sense.
--
David.
w1<- w1[order(w1$Freq, decreasing=TRUE),] w1<-head(w1, 20)
20 times, where W1-20 (capital letters) are the fields in a
data.frame called "lit" and w1-20 are the data.frames being created.
Hope that explains it better,
m
-----Original Message-----
From: Patrick Burns [mailto:pbu...@pburns.seanet.com]
Subject: Re: [R] Loop
If I understand properly, you'll want
something like:
lit[["w2"]]
instead of
lit$w2
more accurately:
for(i in 1:20) {
vari <- paste("w", i)
lit[[vari]]
...
}
The two documents mentioned in my
signature may help you.
On 03/11/2010 20:23, Matevž Pavlič wrote:
Hi all,
I managed to do what i want (with the great help of thi mailing
list) manually . Now i would like to automate it. I would probably
need a for loop for to help me with this...but of course I have no
idea how to do that in R. Bellow is the code that i would like to
be replicated for a number of times (let say 20). I would like to
achieve that w1 would change to w2, w3, w4 ... up to w20 and by
that create 20 data.frames that I would than bind together with
cbind.
(i did it like shown bellow -manually)
w1<-table(lit$W1)
w1<-as.data.frame(w1)
write.table(w1,file="w1.csv",sep=";",row.names=T, dec=".")
w1<- w1[order(w1$Freq, decreasing=TRUE),]
w1<-head(w1, 20)
w2<-table(lit$W2)
w2<-as.data.frame(w2)
write.table(w2,file="w2.csv",sep=";",row.names=T, dec=".")
w2<- w2[order(w2$Freq, decreasing=TRUE),]
w2<-head(w2, 20)
.
.
.
Thanks for the help,m
David Winsemius, MD
West Hartford, CT
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