similar to: Filling in a series

Displaying 20 results from an estimated 10000 matches similar to: "Filling in a series"

2005 Oct 18
6
Subsetting a list
Colleagues, I have created a list in the following manner: TEST <- list(c("A1", "A2"), c("B1", "B2"), c("C1", "C2")) I now want to delete one element from the list, e.g., the third. The command TEST[[3]] yields (as expected): [1] "C1" "C2" The command TEST[[-3]] yields: Error:
2008 Apr 11
3
strsplit and sapply
Colleagues, I have some text: TEXT <- c("a", "bb;ccc", "dddd;eeeee;ffffff") I want to retrieve the portion of each element before the first semicolon. I can split each element using strsplit: SPLIT <- strsplit(TEXT, ";") This yields: > SPLIT [[1]] [1] "a" [[2]] [1] "bb" "ccc" [[3]] [1] "dddd"
2009 Sep 29
3
Deleting a column in a dataframe by name
Colleagues, Hopefully a simple problem: I want to delete a column with a known name from a dataframe. I could write: FRAME <- FRAME[, names(FRAME) != NAMETODELETE] or FRAME <- FRAME[, !names(FRAME) %in% c(NAME1, NAME2, ETC)] Is there some simpler means to accomplish this? Dennis Dennis Fisher MD P < (The "P Less Than" Company) Phone: 1-866-PLessThan (1-866-753-7784)
2007 Sep 04
2
Recursive concatenation
Colleagues, I want to create the following array: "A1", "A2", "A3", "B1", "B2", "B3", "C1", "C2", "C3" I recall that there is a trick using "c" or "paste" permitting me to form all combinations of c("A", "B", "C") and 1:3. But, I can't recall the
2005 Jan 17
2
Question about time series
I have data in the following format: > DATE [1] "01/13/2004" In order to find the difference between two data points, I presently use brute force to calculate the day of the year: > strptime(DATE, format="%m/%d/%Y")$yday [1] 12 Although this works, it may not be robust over different years. I assume that R is sufficiently clever that a much simpler approach
2007 Aug 03
3
Sourcing commands but delaying their execution
Colleagues: I have encountered the following situation: SERIES OF COMMANDS source("File1") MORE COMMANDS source("File2") Optimally, I would like File1 and File2 to be merged into a single file (FileMerged). However, if I wrote the following: SERIES OF COMMANDS source("FileMerged") MORE COMMANDS I encounter an error: the File2 portion of FileMerged
2008 Dec 15
3
opening a PDF document
Colleagues, I am interesting in opening a PDF document via the command line from both Windows, OS X, and Linux ( R version 2.8.0). I found a command openPDF in Biobase. However, I would rather execute the command myself. For example, in OS X: > system("open filename.pdf") is successful. Is there a comparable command line command for Windows or Linux? Dennis Dennis Fisher
2005 Jul 22
3
Question regarding subsetting
I run R 2.1.1 in a Linux environment (RedHat 9) although my question is not platform-specific. Consider the following: > A <- c("Prefix-aaa", "Prefix-bbb", "Prefix-ccc") > B <- strsplit(A, "-") > B [[1]] [1] "Prefix" "aaa" [[2]] [1] "Prefix" "bbb" [[3]] [1] "Prefix" "ccc" How
2009 Jan 30
3
identifying what labels have been created in a plot
Colleagues R 2.8.0; OS X, Vista, Ubuntu Linux In some instances, when I create a graphic using plot(XVAR, YVAR), it would be valuable to know the values that R will display on the y-axis (e.g., if the range of data is 0-70, it might display 0, 10, 30, 50, 70). Is there a simple means to access these values? Also, in some instances, additional ticks appear between the displayed values
2009 Sep 23
2
Updating R for Linux
Colleagues, Please forgive my ignorance of this topic. I am experienced with the installation/use of R in OSX and Windows, much less so with Linux. I just created a virtual machine of Ubuntu 9.0.4. Using the Synaptic Package Manager, I installed R 2.8.1. I would like to obtain 2.9.x and I am having trouble doing so using the tools available within Ubuntu. I tried apt-get install
2008 Nov 07
2
Unexpected behavior of clocktime related to daylight savings time
Colleagues, I submitted this several days ago and no one responded, so I am trying again, trying a different subject line: I just encountered some unexpected behavior of difftime in relationship to the change from daylight savings to standard time. My understanding is that DST and ST take effect at 2AM. However, the results below suggests that R (version 2.8.0 in OS X) implements the
2005 Dec 04
2
tiff graphics
Colleagues I frequently insert PDF graphics created with R into Word (Office 2004 for Mac) documents. The documents are created on either a Linux machine (RedHat 9) or a Mac (Tiger). I am using R 2.2.0. These pdf graphics often lose a great deal of resolution after insertion into Word compared to their high quality when printed as PDF documents. I recently learned that converting the
2007 Sep 17
3
Sourcing encrypted files
Colleagues, I have an unusual problem; I am wondering whether anyone has dealt with it and found a solution. I have a script that needs to be encrypted. R will then be run on the script. There are various means to decrypt the file, some of which leave the decrypted code on the hard drive for an excessive period. One means that I have considered to deal with this is the following
2008 Jul 29
1
Removing script file
Colleagues, (Running R 2.7.0) I have a script that I want to delete as it completes execution. The penultimate line of the script (before the quit command) is: file.remove("Scriptname") The script is executed as: R --no-save < Scriptname In OS X and Linux this is successful and returns: > > file.remove("x") > [1] TRUE and the file is deleted In Windows XP,
2008 Jun 09
2
readLines fails to read entire file
Colleagues I have just encountered an interesting problem with readLines in R 2.7.0 in Windows Vista. I am trying to read a line that is created in the following manner: 1. Intel Fortran (ifort) 10.1 creates two text files. 2. The OS concatenates these files with: copy FILE1 +FILE2 FILE3 From R, I execute: readLines("FILE3") Only the first portion of the file (the original
2008 May 10
2
Random number generation
Colleagues, I have encountered behavior of random number generation that eludes me. I generate a random integer in a particular range using the following code: sample(1000:9999, size=1) This code exists within a script that starts with the command: remove(list=ls()) Each time that I run the script, it yields the same random number: 6420. I thought that the problem might result from
2009 May 11
1
R errors when trying to read a file
Colleagues, I have encountered a problem in version 2.9 of R, running in both Vista and OS X. My code is quite lengthy but the critical line is: if (file.exists(FILENAME)) readLines(FILENAME)) This triggers the error: Error in file(con, "r") : cannot open the connection Calls: readLines -> file Execution halted The file that it is reading is being created on the fly, then
2008 Dec 09
2
Replacing tabs with appropriate number of spaces
Colleagues, Platform: OS X (but issue applies to all platforms) Version: 2.8.0 I have a mixture of text and data that I am outputting via R to a pdf document (using a fixed-width font). The text contains tabs that align columns properly with a fixed-width font in a terminal window. However, when the PDF document is created, the concept of a tab is not invoked properly and columns do
2008 Oct 12
2
proper use of textConnection
Colleagues, Using R2.7.0 in OS X, I am having trouble understanding the command textConnection. My situation is as follows: 1. I am trying to read a lengthy file (45000 lines) that has headers ~ every 1000 lines. read.table (or its variants) fail because of the recurrent headers. 2. My present approach is the following: a. use readLines to read the file, save as an array b. use grep
2008 Sep 17
1
Dealing with missing EOL at end of file
Colleagues, I am using R 2.7.2 on all three platforms (OS X; Windows; Linux) and I have encountered the following problem: I use R to issue a system call the execute a command in the OS. For example: system("DOSOMETHING TOSOMEFILE") In most situations, this task completes successfully and control returns to R. However, in rare situations, the target file (TOSOMEFILE) is