Displaying 8 results from an estimated 8 matches for "datafames".
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dataframes
2013 Jan 11
3
split & rbind (cast) dataframe
Hi,
I would like to split dataframe based on one colum and want
to connect the two dataframes by rows (like rbind). Here a small example:
# The orgininal dataframe
df1 <- data.frame(col1 = c("A","A","B","B"),col2 = c(1:4), col3 = c(1:4))
# The datafame how it could look like
df2 <- data.frame(A.col2 = c(1,2), A.col3 = c(1,2), B.col2 = c(3,4),
B.col3
2005 Feb 04
3
Handling large data sets via scan()
I'm trying to read in datasets with roughly 150,000 rows and 600
features. I wrote a function using scan() to read it in (I have a 4GB
linux machine) and it works like a charm. Unfortunately, converting the
scanned list into a datafame using as.data.frame() causes the memory
usage to explode (it can go from 300MB for the scanned list to 1.4GB for
a data.frame of 30000 rows) and it fails
2008 Feb 10
2
reshape
Dear colleagues,
I'd like to reshape a datafame in a long format to a wide format, but
I do not quite get what I want. Here is an example of the data I've
have (dat):
sp <- c("a", "a", "a", "a", "b", "b", "b", "c", "d", "d", "d", "d")
tr <- c("A",
2008 Feb 08
1
reshape question
I know there are a lot of reshape questions on the mailing list, but I
haven't been able to find an answer to this particular issue.
I am trying to get a datafame structured like this:
> sub <- rep(1:5)
> ta1 <- rep(1,5)
> ta2 <- rep(2,5)
> tb1<- rep(3,5)
> tb2 <- rep(4,5)
> DF <- data.frame(sub,ta1,ta2,tb1,tb2)
> DF
sub ta1 ta2 tb1 tb2
1
2009 Dec 01
4
median for time data
Hi everybody
How do I do to calculate the median and average of a colum of time data like
this: "8:50:10". I also need to plot the time difference between two colums
Thanks a lot
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2008 Jan 27
3
need help opening a file
Hi, I can't believe I am unable to do this. I just installed R (never used
it before, but want to learn it). At present, though. all I want to do is
export a data file (specifically "crabs" in the MASS library) to a text file
for use in SPSS. It allows me to peek into the dataset, using the command
head(crabs) but I can neither view the entire file nor can I seem to export
it to a
2010 Sep 22
2
How to fix error: 'x' and 'y' lengths differ
Hi, im a student so still very new to R. Hope someone could help me out here
=)
They are 3 slug control products, bustaslug, product X and Y. Im ask to
explore the data by plot() and tapply(). But when i try to plot or use the
tapply command, it tells me that the x and y lengths differ. so im thinking
its because the data is unbalanced? Is there a simple command that i could
use to fix this?
2008 Feb 11
0
Testing for differecnes between groups, need help to find the right test in R. (Kes Knave)
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Subject: R-help Digest, Vol 60, Issue 11
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