Grokbase Groups R r-help April 2016
FAQ
You can always add those names to the list: is this what you are after?

example.names <- c("con1-1-masked-bottom-green.tsv",
"con1-1-masked-bottom-red.tsv"
+ , "con1-1-masked-top-green.tsv", "con1-1-masked-top-red.tsv")
example.list <- strsplit(example.names, "-")
names(example.list) <- example.names
example.df <- as.data.frame(example.list)

example.df
   con1.1.masked.bottom.green.tsv con1.1.masked.bottom.red.tsv
con1.1.masked.top.green.tsv
1 con1 con1
          con1
2 1 1
             1
3 masked masked
        masked
4 bottom bottom
           top
5 green.tsv red.tsv
     green.tsv
   con1.1.masked.top.red.tsv
1 con1
2 1
3 masked
4 top
5 red.tsv
str(example.df)
'data.frame': 5 obs. of 4 variables:
  $ con1.1.masked.bottom.green.tsv: Factor w/ 5 levels
"1","bottom","con1",..: 3 1 5 2 4
  $ con1.1.masked.bottom.red.tsv : Factor w/ 5 levels
"1","bottom","con1",..: 3 1 4 2 5
  $ con1.1.masked.top.green.tsv : Factor w/ 5 levels
"1","con1","green.tsv",..: 2 1 4 5 3
  $ con1.1.masked.top.red.tsv : Factor w/ 5 levels
"1","con1","masked",..: 2 1 3 5 4






Jim Holtman
Data Munger Guru


What is the problem that you are trying to solve?
Tell me what you want to do, not how you want to do it.


On Mon, Apr 18, 2016 at 4:21 PM, Ed Siefker wrote:

I'm doing some string manipulation on a vector of file names, and noticed
something curious. When I strsplit the vector, I get a list of
character vectors.
The list is numbered, as lists are. When I cast that list as a data
frame with 'as.data.frame()', the resulting columns have names derived
from the original filenames.

Example code is below. My question is, where are these names stored
in the list? Are there methods that can access this from the list?
Is there a way to preserve them verbatim? Thanks
-Ed
example.names
[1] "con1-1-masked-bottom-green.tsv" "con1-1-masked-bottom-red.tsv"
[3] "con1-1-masked-top-green.tsv" "con1-1-masked-top-red.tsv"
example.list <- strsplit(example.names, "-")
example.list
[[1]]
[1] "con1" "1" "masked" "bottom" "green.tsv"

[[2]]
[1] "con1" "1" "masked" "bottom" "red.tsv"

[[3]]
[1] "con1" "1" "masked" "top" "green.tsv"

[[4]]
[1] "con1" "1" "masked" "top" "red.tsv"
example.df <- as.data.frame(example.list)
example.df
c..con1....1....masked....bottom....green.tsv..
1 con1
2 1
3 masked
4 bottom
5 green.tsv
c..con1....1....masked....bottom....red.tsv..
1 con1
2 1
3 masked
4 bottom
5 red.tsv
c..con1....1....masked....top....green.tsv..
1 con1
2 1
3 masked
4 top
5 green.tsv
c..con1....1....masked....top....red.tsv..
1 con1
2 1
3 masked
4 top
5 red.tsv

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