Attachments have been stripped by the mailing list. Read the Posting Guide.
Also, English can help, but R code can be ever so much more clear in indicating
what you have to work with and even what you want out of the broken/missing
part of your code.
I really think you need to create a simple reprex to show us what you want
to do. In doing so, you may figure out how to get what you want. I suspect
you may also need to spend some more time learning R -- following rote
examples can be a fool's errand if you don't know the basics.
Bert Gunter
r-help mailing list
> Subject: Re: [R] merging multiple .csv files
>
> I know that but I do not want to merge them sequentially because I may lose
> some rows which are present in one file while the other doesn't have. I
> googled and found something called multmerge but the code i
Did you work the examples in help("merge")? Also, have you looked at
the "dplyr" package? It has 9 different vignettes. The lead author is
Hadley Wickham, who won the 2019 COPSS Presidents' Award for work like
this.
Alternatively, you could manually read all 10 files, then figure
I know that but I do not want to merge them sequentially because I may lose
some rows which are present in one file while the other doesn't have. I
googled and found something called multmerge but the code is not working
for me. I used the following:
path <-"P:/Documents/Puja Desktop
?read.csv to read your csv files in data frames
?merge to merge them (sequentially).
Bert Gunter
"The trouble with having an open mind is that people keep coming along and
sticking things into it."
-- Opus (aka Berkeley Breathed in his "Bloom County" comic strip )
On Tue, Dec 15, 2020 at 1:36
Simply pass all = FALSE to merge_all
merge_all(list_of_files, by = Name, all = FALSE)
Michael
On Wed, Apr 11, 2012 at 1:09 AM, Chintanu chint...@gmail.com wrote:
Thanks to David and Michael
Michael:
That works, however with a glitch. Each of my 24 files has got two columns:
Name, and
Thanks again.
By the way, any idea why I get this error:
merged3 - merge_all(list_of_files , by = Name)
Error in `[.data.frame`(df, , match(names(dfs[[1]]), names(df))) :
undefined columns selected
sessionInfo()
R version 2.14.2 (2012-02-29)
Platform: i386-pc-mingw32/i386 (32-bit)
locale:
Your problem is that you can't merge the file names, but you need to
load them into R and merge the resulting objects.
This should be straightforward enough to do:
file_list - list.files()
list_of_files - lapply(file_list, read.csv) # Read in each file
merge_all(list_of_files, by = Name)
On Apr 11, 2012, at 12:17 AM, R. Michael Weylandt wrote:
Your problem is that you can't merge the file names, but you need to
load them into R and merge the resulting objects.
This should be straightforward enough to do:
file_list - list.files()
list_of_files - lapply(file_list, read.csv) #
Thanks to David and Michael
Michael:
That works, however with a glitch. Each of my 24 files has got two columns:
Name, and Rank/score.
file_list - list.files()
list_of_files - lapply(file_list, read.csv) # Read in each file
# I can see the 2-columns at this stage. However, the following line:
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