similar to: remove last row of a data frame

Say I have a dataframe like this: df <- data.frame(cbind(c(1,0,0,1),c(0,1,0,0),c(0,0,1,0))) names(df) <- c('a','b','c') I would like to create a factor in a new column, where the factor values are taken from the column names, like this: > df2 a b c f 1 1 0 0 a 2 0 1 0 b 3 0 0 1 c 4 1 0 0 a How would I do this? Thanks, Dan Daniel Nordlund Bothell, WA USA

If I have two matrices like x <- matrix(rep(c(1,2,3),3),3) y <- matrix(rep(c(4,5,6),3),3) How can I combine them to get ? 1 1 1 4 4 4 1 1 1 5 5 5 1 1 1 6 6 6 2 2 2 4 4 4 2 2 2 5 5 5 2 2 2 6 6 6 3 3 3 4 4 4 3 3 3 5 5 5 3 3 3 6 6 6 The number of rows and the actual numbers above are unimportant, they are given so as to illustrate how I want to combine the matrices. I.e., I am looking for

Readers, Am trying to plot a graph with type 'h' and want to remove the white space between the plot lines and the x axis. The help section 'par' suggests that the option 'mai' controls this feature, but the syntax plot(...mai=c(0,1,1)) is ineffective Any advice please? -- r2151

Hello, I wanted to ask help about importing sas datasets. 1)I tried with some functions as read.ssd (foreign package), but it doesn't import the file if the length of the variables' names are longer than 8 bite (it has to conform to the 6 version). 2)I then tried with the sas.get function (Hmisc package) but with the command: c<- sas.get(lib="c:\\ghan",

Readers, For a 12 hour time stamp: > testtime<-("2013-01-01 01:00:01 PM") > testtime [1] "2013-01-01 01:00:01 PM" > testtime24hour<-strftime(testtime,'%H:%M:%S') > testtime24hour [1] "01:00:01" how to convert to 24 hour format so that the object 'testtime24hour' is: '13:00:01' Thanks. -- r2151

Dear Daniel and Jorge, Thank you very much and it does help. If I have a string "ABCD", how can I access the second element of the string "B"? Thanks, Miao 2012/7/27 Daniel Nordlund <djnordlund@frontier.com> > > -----Original Message----- > > From: r-help-bounces@r-project.org [mailto:r-help-bounces@r-project.org] > > On Behalf Of jpm miao

Readers, For this data set: testvalues<-c(10,20,30,40) How to amend the plot instruction: plot(testvalues,ann=FALSE,type='l',yaxt='n',xaxt='n') so that x axis ticks labels can be added to existing graph with arbitrary value such as 0,100,200,300)? Thanks in advance. -- r2151

I am using R-2.10.1 binary from CRAN on a WinXP Pro system. I also use SAS v9.2 on the same box. I just started using the SAS ODBC driver that comes with version 9 of SAS. I have been able to set up an ODBC source for SAS datasets using the driver, and then with RODBC I am able to read a sample SAS dataset. > library(RODBC) > ch <- odbcConnect('sasodbc', believeNRows=FALSE)

Dear Group I have few errors while installing package rattle from CRAN i do the installing from the local zip files... I am using R 2.4.0 do i have to upgrade to R2.4.1 ? ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ utils:::menuInstallLocal() package 'rattle' successfully unpacked and MD5 sums checked updating HTML package descriptions > help(rattle) No

Hi, The page http://cran.r-project.org/bin/windows/base/rtest.html has a link to: http://cran.r-project.org/bin/windows/base/R-2.15.0rc-win.exe However, clicking on that link gives a 404 "Object not found' error. FYI. Dan

Has anyone heard whether Revolution Analytics is going to release this capability to the R community? http://www.businesswire.com/news/home/20110201005852/en/Revolution-Analytics-Unlocks-SAS-Data Dan Daniel Nordlund Bothell, WA USA

I am a new user of Linux (long time user of Windows) whose only training is from books, articles, and just playing with Linux. I have built and installed R from source, and also installed from RPMs (SuSE). I am wondering where in the file system experienced users of R and Linux typically install R. Are there any conventions, or any reasons to choose one location over another? I know that

When I type the following, I get results different from what I expected. > sprintf('%a',3) [1] "0x1.8" Shouldn't the result be [1] "0x1.8p+2" I read through the help ?sprintf and didn't find anything that changed my expectation. What am I misunderstanding? I am using R-2.9.0 binary from CRAN on Windows XP Pro, and my session info is >

When I type the following, I get results different from what I expected. > sprintf('%a',3) [1] "0x1.8" Shouldn't the result be [1] "0x1.8p+2" I read through the help ?sprintf and didn't find anything that changed my expectation. What am I misunderstanding? I am using R-2.9.0 binary from CRAN on Windows XP Pro, and my session info is >

I am trying to copy files to a password protected drive which is "Ranch" at TACC from another network drive. I am logged in to the source drive and can run R there. The following code does not even find the destination folder. file.copy("sourcedrive/file.tar", " username@ranch.tacc.utexas.edu/uniqueID/destinationfolder/file.tar", overwrite = FALSE) Thanks in

Hi, The first column in as.matrix(x) has extra spaces (" "), which I don't want. Is there a way not to generate those spaces? Regards, Peng > x=data.frame(x=1:10,y=letters[11:20]) > as.matrix(x) x y [1,] " 1" "k" [2,] " 2" "l" [3,] " 3" "m" [4,] " 4" "n" [5,] " 5"

I am trying to resolve a problem I am having with running the rattle package on two different Windows 7 x64 systems. It appears to be a problem with my two specific systems, because others on Windows 7 x64 systems aren't complaining about this problem. What I am looking for is a method for trying to determine the source of the problem. Here is what I am experiencing. I had Rattle running

I am trying to work my way through the book "Singer, JD and Willett, JB, Applied Longitudinal Data Analysis. Oxford University Press, 2003" using R. I have the SAS code and S-Plus code from the UCLA site (doesn't include chapter 8 or later problems). In chapter 8, there is a structural equation/path model which can be specified for the sem package as follows S <- cov(al2)

I encountered the following problem in R-2.4.0 for Windows binary downloaded from CRAN (data from R-help post by Ethan Johnsons). I was also using the contributed binary Rblas.dll for Intel P4 chip. The problem doesn't occur with the default Rblas.dll. x=c(3.05176E-05, 0.000457764, 0.003204346, 0.0138855, 0.04165649, 0.09164429, 0.1527405, 0.1963806, 0.1963806, 0.1527405, 0.09164429,

Hello All, I have a data.frame with this structure: m <- matrix(sample(c(rep('yes', 10, replace = TRUE), rep('no', 10, replace = TRUE), NA), 500, replace = TRUE), nrow = 100, ncol = 5) colnames(m) <- colnames(m, do.NULL = FALSE, prefix = "col") m <- as.data.frame(m) I need to generate a Venn diagram from this data.frame, displaying the various intersections of