[R] list entries file into a list

[Albert Vilella]

This worked great but I'm a bit confused about how to access the names
(keys?) of a list in a loop, and why this is failing for me:

I want to cross the entries in "mylist" (like "entry0001") with the
columns of a dataframe "ginput":

$entry0001
> [1] "AB0032"  "CF32134" "DF34334"
> 
> $entry0002
> [1] "AB0033"
> 
> $entry0003
> [1] "AB0032"   "CF32134"  "DF34334"  "DD343434" "DD34222" 
> 
> $entry0004
> [1] "AB0032"  "CF32134"

> ginput
             mid    reffile       pa
1     myetag0001     AB0032 0.778270
2     myetag0002     AB0032 0.153093
3     myetag0003     AB0032 0.392175
4     myetag0004     AB0032 0.696303
5     myetag0005     AB0032 0.688537
6     myetag0006     AB0032 0.767044
7     myetag0001     AB0033 0.420000
8     myetag0002     AB0033 0.330333
9     myetag0003     AB0033 0.238013
10    myetag0004     AB0033 0.043213
...

The rough idea has been to do something like:

mynames = rep(0,length(names(mylist)))
mypas = rep(0,length(names(mylist)))
i = 0
for (entrylabel in names(mylist)) {
  mynames[i] = entrylabel
  mypas[i] =+ sum(ginput$pa[ginput$reffile %in% mylist$entrylabel])
  i = i+1
}

But mylist$entrylabel is not working inside the loop.
I checked that entrylabel returns:
[1] "entry0001"
And that mylist$entry0001 is returning the right list.

I would like to end up with something like:

dfpa = data.frame(dfnames=mynames,dfpas=mypas)
> dfpa
    dfnames       dfpas
1 entry0001    3.475422
2 entry0002    2.221355
...

I haven't been able to found my way with R lists, maybe because I'm
comparing them with perl's hashes.

Any idea of what I'm missing?

    Albert.




El dj 26 de 01 del 2006 a les 08:14 -0500, en/na Liaw, Andy va escriure:
> The following might be what you want (replace "clipboard" with your
> filename):
> 
> > mylist <- strsplit(readLines("clipboard"), ":")
> > nm <- sapply(mylist, "[", 1)
> > mylist <- lapply(mylist, "[", -1)
> > names(mylist) <- nm
> > mylist <- lapply(mylist, function(s) strsplit(s, ",")[[1]])
> > mylist
> $entry0001
> [1] "AB0032"  "CF32134" "DF34334"
> 
> $entry0002
> [1] "AB0033"
> 
> $entry0003
> [1] "AB0032"   "CF32134"  "DF34334"  "DD343434" "DD34222" 
> 
> $entry0004
> [1] "AB0032"  "CF32134"
> 
> Andy
> 
> From: Albert Vilella
> > 
> > Hi all,
> > 
> > I have a file of this kind:
> > 
> > entry0001:AB0032,CF32134,DF34334
> > entry0002:AB0033
> > entry0003:AB0032,CF32134,DF34334,DD343434,DD34222
> > entry0004:AB0032,CF32134
> > 
> > And I would like to read it into something like a hash, so that I can
> > then loop over it by keys and values.
> > 
> > I wonder which would be the best way to do that in R?
> > 
> > Thanks,
> > 
> >     Albert.
> > 
> > ______________________________________________
> > R-help at stat.math.ethz.ch mailing list
> > https://stat.ethz.ch/mailman/listinfo/r-help
> > PLEASE do read the posting guide! 
> > http://www.R-project.org/posting-guide.html
> > 
> > 
> 
> 
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