On 04.04.2011 16:41, Umesh Rosyara wrote:
Dear R community members
I did find a good way to merge my 200 text data files in to a single data
file with one column added will show indicator for that file.
filelist = list.files(pattern = "K*cd.txt")
I doubt you meant "K*cd.txt" but "^K[[:digit:]]*cd\\.txt$".
# the file names are K1cd.txt
.................to K200cd.txt
data_list<-lapply(filelist, read.table, header=T, comment=";", fill=T)
Replace by:
data_list <- lapply(filelist, function(x)
cbind(Filename = x, read.table(x, header=T, comment=";", fill=TRUE))
And then:
result <- do.call("rbind", data_list)
Uwe Ligges
This will create list, but this is not what I want.
I want a single dataframe (all separate dataframes have same variable
headings) with additional row for example
; just for example, two small datasets are created by my component datasets
are huge, need automation
;read from file K1cd.txt
var1 var2 var3 var4
1 6 0.3 8
3 4 0.4 9
2 3 0.4 6
1 0.4 0.9 3
;read from file K2cd.txt
var1 var2 var3 var4
1 16 0.6 7
3 14 0.4 6
2 1 3 0.4 5
1 0.6 0.9 2
the output dataframe should look like
Fileno var1 var2 var3 var4
1 1 6 0.3 8
1 3 4 0.4 9
1 2 3 0.4 6
1 1 0.4 0.9 3
2 1 16 0.6 7
2 3 14 0.4 6
2 2 1 3 0.4 5
2 1 0.6 0.9 2
Please note that new file no column is added
Thank you for the help.
Umesh R
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