Re: [R] Reading name-value data
Yes! Would you mind filing an issue so I dont forget?
Hadley
On Friday, July 29, 2011, Stavros Macrakis macra...@alum.mit.edu wrote:
Perfect! Thanks!
By the way, I see that, unlike base rbind, it does not work for vectors
and lists:
rbind(c(a=1),c(b=2)) = matrix(1:2,2,1,dimnames=list(NULL,a))
== as.matrix(data.frame(a=1:2))
but
rbind.fill(c(a=1),c(b=2)) = NULL
Shouldn't it give something like
matrix(c(1,NA,NA,2),2,2,dimnames=list(NULL,c(a,b)))
or
data.frame(a=c(1,NA),b=c(NA,2))
If, on the other hand, it insists on data.frames as input, it should err
out if give non-data-frames.
-s
On Thu, Jul 28, 2011 at 19:30, Hadley Wickham had...@rice.edu wrote:
Use plyr::rbind.fill? That does match up columns by name.
Hadley
On Thu, Jul 28, 2011 at 5:23 PM, Stavros Macrakis macra...@alum.mit.edu
wrote:
I have a file of data where each line is a series of name-value pairs,
but
where the names are not necessarily the same from line to line, e.g.
a=1,b=2,d=5
b=4,c=3,e=3
a=5,d=1
I would like to create a data frame which lines up the data in the
corresponding columns. In this case, this would be
data.frame( a = (1, NA, 4), b = (2, 4, NA), c = (NA, 3, NA), d = (5,
NA,
1), e = (NA, 3, 1) )
One way I can think of doing this is to read in the data as one 'long'
data
frame per line with a unique ID, e.g. line one becomes
cbind(id=1,data.frame(variable=c('a','b','d'),value=c(1,2,5)))
then rbind all the lines and use the reshape package function 'cast'.
Is there a more straightforward way? (I'd have thought rbind would
line up
columns by name, but it doesn't.)
-s
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Assistant Professor / Dobelman Family Junior Chair
Department of Statistics / Rice University
http://had.co.nz/
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Re: [R] Reading name-value data
Perfect! Thanks!
By the way, I see that, unlike base rbind, it does not work for vectors and
lists:
rbind(c(a=1),c(b=2)) = matrix(1:2,2,1,dimnames=list(NULL,a))
== as.matrix(data.frame(a=1:2))
but
rbind.fill(c(a=1),c(b=2)) = NULL
Shouldn't it give something like
matrix(c(1,NA,NA,2),2,2,dimnames=list(NULL,c(a,b)))
or
data.frame(a=c(1,NA),b=c(NA,2))
If, on the other hand, it insists on data.frames as input, it should err out
if give non-data-frames.
-s
On Thu, Jul 28, 2011 at 19:30, Hadley Wickham had...@rice.edu wrote:
Use plyr::rbind.fill? That does match up columns by name.
Hadley
On Thu, Jul 28, 2011 at 5:23 PM, Stavros Macrakis macra...@alum.mit.edu
wrote:
I have a file of data where each line is a series of name-value pairs,
but
where the names are not necessarily the same from line to line, e.g.
a=1,b=2,d=5
b=4,c=3,e=3
a=5,d=1
I would like to create a data frame which lines up the data in the
corresponding columns. In this case, this would be
data.frame( a = (1, NA, 4), b = (2, 4, NA), c = (NA, 3, NA), d = (5,
NA,
1), e = (NA, 3, 1) )
One way I can think of doing this is to read in the data as one 'long'
data
frame per line with a unique ID, e.g. line one becomes
cbind(id=1,data.frame(variable=c('a','b','d'),value=c(1,2,5)))
then rbind all the lines and use the reshape package function 'cast'.
Is there a more straightforward way? (I'd have thought rbind would line
up
columns by name, but it doesn't.)
-s
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Department of Statistics / Rice University
http://had.co.nz/
[[alternative HTML version deleted]]
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and provide commented, minimal, self-contained, reproducible code.
[R] Reading name-value data
I have a file of data where each line is a series of name-value pairs, but
where the names are not necessarily the same from line to line, e.g.
a=1,b=2,d=5
b=4,c=3,e=3
a=5,d=1
I would like to create a data frame which lines up the data in the
corresponding columns. In this case, this would be
data.frame( a = (1, NA, 4), b = (2, 4, NA), c = (NA, 3, NA), d = (5, NA,
1), e = (NA, 3, 1) )
One way I can think of doing this is to read in the data as one 'long' data
frame per line with a unique ID, e.g. line one becomes
cbind(id=1,data.frame(variable=c('a','b','d'),value=c(1,2,5)))
then rbind all the lines and use the reshape package function 'cast'.
Is there a more straightforward way? (I'd have thought rbind would line up
columns by name, but it doesn't.)
-s
[[alternative HTML version deleted]]
__
R-help@r-project.org mailing list
https://stat.ethz.ch/mailman/listinfo/r-help
PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
and provide commented, minimal, self-contained, reproducible code.
Re: [R] Reading name-value data
Use plyr::rbind.fill? That does match up columns by name.
Hadley
On Thu, Jul 28, 2011 at 5:23 PM, Stavros Macrakis macra...@alum.mit.edu wrote:
I have a file of data where each line is a series of name-value pairs, but
where the names are not necessarily the same from line to line, e.g.
a=1,b=2,d=5
b=4,c=3,e=3
a=5,d=1
I would like to create a data frame which lines up the data in the
corresponding columns. In this case, this would be
data.frame( a = (1, NA, 4), b = (2, 4, NA), c = (NA, 3, NA), d = (5, NA,
1), e = (NA, 3, 1) )
One way I can think of doing this is to read in the data as one 'long' data
frame per line with a unique ID, e.g. line one becomes
cbind(id=1,data.frame(variable=c('a','b','d'),value=c(1,2,5)))
then rbind all the lines and use the reshape package function 'cast'.
Is there a more straightforward way? (I'd have thought rbind would line up
columns by name, but it doesn't.)
-s
--
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--
Assistant Professor / Dobelman Family Junior Chair
Department of Statistics / Rice University
http://had.co.nz/
__
R-help@r-project.org mailing list
https://stat.ethz.ch/mailman/listinfo/r-help
PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
and provide commented, minimal, self-contained, reproducible code.
