similar to: Characters To Matrix

Hello, I have a date in the format Year-Month Name (e.g. 1990-January) and R classes it as a character. I want to convert this character into a date format, but when I try as.Date(1990-January, "%Y-%B"), I get back NA. The function strptime also gives me NA back. Thanks. [[alternative HTML version deleted]]

R 2.15.1 OS X Colleagues, I am reading a 1 GB file into R using read.table. The file consists of 100 tables, each of which is headed by two lines of characters. The first of these lines is: TABLE NO. 1 The second is a list of column headers. For example: TABLE NO. 1 COL1 COL2 COL3 COL4 COL5 COL6 COL7 COL8 COL9 COL10

Colleagues R 2.10.1 on a Mac I read in textfiles using readLines, then I process those files, then I use R to execute another program. Occasionally those files contain characters other than letter / numbers / routine punctuation marks. For example, a bullet (option-8 on a Mac) triggers the problem. Although R can read and process those characters, the other program cannot so I would like to

Hi all I'm a programmer at the psychology dept, and last week, I was asked to write an application to analyze some result data from CO2 measurement experiments. I don't want to reinvent the wheel, so before I start custom coding in C, I'd though to look around a bit and bumped into R on freshmeat. basically, it is a 2-column data sheet, with timings on col1 and CO2 value on col2.

Hi! Here is some output from an str command: > str(CO2) Classes ‘nfnGroupedData’, ‘nfGroupedData’, ‘groupedData’ and 'data.frame': 84 obs. of 5 variables: $ Plant : Ord.factor w/ 12 levels "Qn1"<"Qn2"<"Qn3"<..: 1 1 1 1 1 1 1 2 2 2 ... $ Type : Factor w/ 2 levels "Quebec","Mississippi": 1 1 1 1 1 1 1 1 1 1 ... $

Hi, I'm trying to write a regular expression that captures numbers in the form 9,007,653,372,262.48 but does not capture dates in the form 09/30/2005 I have tried numerous expressions, but they all seem to return the dates as well. Thanks. [[alternative HTML version deleted]]

Dear useRs, When I'm using Hmisc's latex() function with ctable=TRUE on a summary.formula with method="reverse" object and saving in a .tex file, the latter contains an unwanted empty line which makes compilation fail. Here is a brief example : library(Hmisc) test <- data.frame(a=sample(1:30,10),b=sample(c("good","bad","ugly"),10,replace=T))

hi all - i'm just wondering what sort of code people write to essentially performa an aggregate call, but with different functions being applied to the various columns. for example, if i have a data frame x and would like to marginalize by a factor f for the rows, but apply mean() to col1 and median() to col2. if i wanted to apply mean() to both columns, i would call: aggregate(x, list(f),

I'm use RPostgreSQL to access data on a Postgres server. I would like to keep my SQL statements in external files, as they're easier to write and debug in pgAdmin, then I use readLines to bring them into R and feed to dbGetQuery. Here's the problem. When I create a SQL script with pgAdmin, then load it in R, the ensuing script fails when I feed it to dbGetQuery. When I inspect the

Dear All, Using:- R : Copyright 2005, The R Foundation for Statistical Computing Version 2.1.1 (2005-06-20), ISBN 3-900051-07-0 and Jose Pinheiro, Douglas Bates, Saikat DebRoy and Deepayan Sarkar (2005). nlme: Linear and nonlinear mixed effects models. R package version 3.1-65. on a WINDOWS 2000 machine I am trying to run the scripts from the Mixed Models book and am running into some

Hello, The diffs below are based on revision 37445 and show some typo corrections for writeLines.Rd, readLines.Rd, and data.matrix.Rd that I'd like to bring to the list's attention. Sincerely, Stephen Weigand Rochester, Minnesota, USA --- ./src/library/base/man/writeLines.Rd Sun Feb 26 13:46:06 2006 +++ /tmp/writeLines.Rd Sun Feb 26 20:53:44 2006 @@ -14,8 +14,8 @@ each

Dear all, I read a file with all numbers with readLines function, as below, > f <- file("data.txt") > a <- readLines(f) but all the values in a are in format "....", and I cannot do the calculation with them since they are not numeric. I wonder how should I skip those quotes, thank you for help! I have to use readLines function instead of scan, read.table or

I am trying to turn several lines of information into a variable. I used the filx function to input my file then the readlines to qualify what I want. Essentially I have data in a file every 10 minutes through a day for several years down a column: date time value 9/28/10 02:00 13 9/28/10 02:10 15 9/28/10 02:20 12 9/28/10 02:30 11 etc. I then use if statements to segment the day

Hi, R-users, I have a problem: Because there are few files which can't be readed into R completely, so on the following subsequence programme, I use write.table, which creates the "NA" files for those incomplete files autimatically. I don't want those NA files. My programes formats looks like: name_c<-Sys.glob("C:/Documents and Settings/lma/My

Can i use "readLines" to extract only the linees with a specific word within? If yes, how? Tnx for help. -- View this message in context: http://r.789695.n4.nabble.com/Question-about-readLines-tp3044701p3044701.html Sent from the R help mailing list archive at Nabble.com.

All, I have a 30 million record text file without header information. I would like to add a header to this file without reading it first. Is this possible? The code below does what I want except that the readLines portion takes quite a long time. Is there a way around reading the lines? I'm working on Windows XP. Zev input<-readLines("c:/junk/forR.csv")

Hi, I wonder whether there is any convenient function (or package) to extract tables from a HTML page? e.g. from http://www.google.com/finance/historical?q=SHE:002251 I know we can readLines('URL'), gsub('<td>...', '...', source), ... and at last get the numbers; I'm writing to ask whether someone has already contributed a more general function (with the package

Hi, I am reading a large space-delimited text file into R (41 columns and many rows) and need to do run each row's values through another R object and then write to another text file. So, far using readLines and writeLines seems to be the best bet. I've gotten the data exchange working except each row is read in as one 'chunk', meaning the row has all values between two quotes

Hello, how to merge a data.frame and a matrix by one column in the data.frame and rownames of the matrix? df <- data.frame(col1=c("kk","yy","kk"),col2=c(6,4,3)) > df   col1 col2 1   kk    6 2   yy    4 3   kk    3 m<-matrix(c(3,8,56,9), nrow=2, dimnames = list(c("aa","kk"),c("col1","col2"))) > m    col1 col2 aa   

Greetings, I am not familiar with processing text in R. Can someone tell me how to read each line of words as separate elements in a list? FE, I would like to turn: word1 word2 word3 word2 word4 into a list of length two with three character elements in the first list and two elements in the second. I know that this should be easy, but I am a little confused by the text functions. Thanks in