search for: datafame

Displaying 8 results from an estimated 8 matches for "datafame".

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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 = c(3,4)) I think I already did a similar procedure sometime ago with the cast() command from reshape-package but I cant remember correctly... ...maybe someone can point me to the correct formula....
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 claiming it cannot allocate memory (though it is still not close to the 3GB limit per process on my linux box - the message is "unable to al...
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",...
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 1 1 2 3 4 2 2 1 2 3 4 3 3 1 2 3 4 4 4...
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 -- View this message in context: http://n4.nabble.com/median-for-time-data-tp932287p932287.html Sent from the R help mailing list archive at Nabble.com.
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)
...From: "juli pausas" <pausas at gmail.com> Subject: [R] reshape To: R-help <r-help at stat.math.ethz.ch> Message-ID: <a17009720802101358s62b54220yf3e00878b3fa8537 at mail.gmail.com> Content-Type: text/plain; charset=ISO-8859-1 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",...