Dear all,
I would like to know whether it is possible to unlist elements and keep the
original format of the data.
To make it more clear, let me give an exemple:
I have a list l of dataframes that I created with apply but which looks like
this:
x1=data.frame(Name=LETTERS[1:2],Age=1:2)
x2=data.frame(Name=LETTERS[3:4],Age=3:4)
l=list(x1,x2)
l
[[1]]
Name Age
1 A 1
2 B 2
[[2]]
Name Age
1 C 3
2 D 4
I would like to unlist l to create a dataframe with 2 columns and 4 rows but
keeping the format of Name (character) and Age (numeric).
Now when I unlist l, I obtain :
unlist(l)
Name1 Name2 Age1 Age2 Name1 Name2 Age1 Age2
1 2 1 2 1 2 3 4
Is there a way to at least obtain something like
A 1 B 2 C 3 D 4 as result from the unlist??
Thanks a lot for your replies
Naira
--
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try newdata=do.call(rbind,l) David Freedman, Atlanta Naira wrote:> > Dear all, > > I would like to know whether it is possible to unlist elements and keep > the original format of the data. > To make it more clear, let me give an exemple: > I have a list l of dataframes that I created with apply but which looks > like this: > > x1=data.frame(Name=LETTERS[1:2],Age=1:2) > x2=data.frame(Name=LETTERS[3:4],Age=3:4) > l=list(x1,x2) > l > [[1]] > Name Age > 1 A 1 > 2 B 2 > > [[2]] > Name Age > 1 C 3 > 2 D 4 > > I would like to unlist l to create a dataframe with 2 columns and 4 rows > but keeping the format of Name (character) and Age (numeric). > > Now when I unlist l, I obtain : > > unlist(l) > Name1 Name2 Age1 Age2 Name1 Name2 Age1 Age2 > 1 2 1 2 1 2 3 4 > > Is there a way to at least obtain something like > A 1 B 2 C 3 D 4 as result from the unlist?? > > Thanks a lot for your replies > Naira > > >----- David Freedman Atlanta -- View this message in context: http://www.nabble.com/unlist---dataframes-tp20358993p20359063.html Sent from the R help mailing list archive at Nabble.com.
I have forgotten to say that the elements in the list are not necessarily equal... meaning that x1 and x2 are from different dimensions so I can't use data.frame(l) More suitable example: x1=data.frame(Name=LETTERS[1:2],Age=1:2) x2=data.frame(Name=LETTERS[3:5],Age=3:5) l=list(x1,x2) l l [[1]] Name Age 1 A 1 2 B 2 [[2]] Name Age 1 C 3 2 D 4 3 E 5 Naira Naira wrote:> > Dear all, > > I would like to know whether it is possible to unlist elements and keep > the original format of the data. > To make it more clear, let me give an exemple: > I have a list l of dataframes that I created with apply but which looks > like this: > > x1=data.frame(Name=LETTERS[1:2],Age=1:2) > x2=data.frame(Name=LETTERS[3:4],Age=3:4) > l=list(x1,x2) > l > [[1]] > Name Age > 1 A 1 > 2 B 2 > > [[2]] > Name Age > 1 C 3 > 2 D 4 > > I would like to unlist l to create a dataframe with 2 columns and 4 rows > but keeping the format of Name (character) and Age (numeric). > > Now when I unlist l, I obtain : > > unlist(l) > Name1 Name2 Age1 Age2 Name1 Name2 Age1 Age2 > 1 2 1 2 1 2 3 4 > > Is there a way to at least obtain something like > A 1 B 2 C 3 D 4 as result from the unlist?? > > Thanks a lot for your replies > Naira > > >-- View this message in context: http://www.nabble.com/unlist---dataframes-tp20358993p20359097.html Sent from the R help mailing list archive at Nabble.com.
Thanks a lot :) It is doing exactly what I want Naira David Freedman wrote:> > try > > newdata=do.call(rbind,l) > > David Freedman, Atlanta > > > > > Naira wrote: >> >> Dear all, >> >> I would like to know whether it is possible to unlist elements and keep >> the original format of the data. >> To make it more clear, let me give an exemple: >> I have a list l of dataframes that I created with apply but which looks >> like this: >> >> x1=data.frame(Name=LETTERS[1:2],Age=1:2) >> x2=data.frame(Name=LETTERS[3:4],Age=3:4) >> l=list(x1,x2) >> l >> [[1]] >> Name Age >> 1 A 1 >> 2 B 2 >> >> [[2]] >> Name Age >> 1 C 3 >> 2 D 4 >> >> I would like to unlist l to create a dataframe with 2 columns and 4 rows >> but keeping the format of Name (character) and Age (numeric). >> >> Now when I unlist l, I obtain : >> >> unlist(l) >> Name1 Name2 Age1 Age2 Name1 Name2 Age1 Age2 >> 1 2 1 2 1 2 3 4 >> >> Is there a way to at least obtain something like >> A 1 B 2 C 3 D 4 as result from the unlist?? >> >> Thanks a lot for your replies >> Naira >> >> >> > >-- View this message in context: http://www.nabble.com/unlist---dataframes-tp20358993p20359182.html Sent from the R help mailing list archive at Nabble.com.