similar to: Is there a way to save EVERYTHING in R?

Hello, How can I tell RODBC to scan all the records of an xls file to determine the data type? If the first n records happen to be empty Rodbc assumes a character, and any numbers are made <NA>. And if, for instance, the first n records contain numbers, and later they also contain characters, those characters become NA. Cheers!! Albert-Jan

Hi all, I am using RStudio. I wanted to copy and past an expression/line. I highlighted it, and then copied and pasted: The result was not the line that I wanted, instead, it was the line above... For example: I have three lines: aaaaa bbbbb ccccc .... I highlighted "bbbbb" and copied, but the pasted outcome was "aaaaa"... What happened? Thanks al ot! [[alternative

Hi all, Lets say I have a huge list which is indexed in the following format: mylist[[i]][[j]][[k]] where the size is 100 x 100 x 100000 If I want to set mylist[[2]][[3]]=NULL How do I free the memory used by that sub-list? Thanks a lot! [[alternative HTML version deleted]]

Hi all, Could you please tell me how do I modify the environment variable (as below), from within R session? LD_LIBRARY_PATH=$LD_LIBRARY_PATH:/mypath export LD_LIBRARY_PATH Thanks a lot! [[alternative HTML version deleted]]

> for (d in paste('df', 1:3, sep='')) { + assign(d, as.data.frame(replicate(3, rnorm(4)))) + } > dats = list(df1,df2,df3) > for (i in 1:length(dats)) { + names(dats[[i]]) = c('w', 'l', 'h') + } > dats [[1]] w l h 1 1.24319239 -0.05543649 0.05409178 2 0.05124331 -1.89346950 0.33896273 3 -1.69686777 -0.35963008

Is there easy way (without copying the existing rows to a temporary location and copying back) to add a new row to a specific index location in an existing data frame? Example df = data.frame( A= c('a','b','c'), B=c(1,2,3), C=(10,20,30)) newrow = c('X', 100, 200) I want to add the newrow as the second row to the data frame df Please suggest a solution that is

From POSIXct to numeric and back with time zone I am running regressions on data which has time series with different time resolution. Some data has hourly resolution, while most has either daily or weekly resolution. Aggregation is used to make the hourly data daily, while liner interpolation is used to find daily data from the weekly time series. This data manipulation requires some careful

Can somebody confirm some unexpected behavior? This is under Windows, with R 2.11.0 and 2.11.1. 1. Create a trivial test file (I called it test.R) containing: cat("Success.\n") 2. Load R (Gui or Term) and run: shell("\"C:\\path\\to\\Rscript.exe\" \"C:\\path\\to\\test.R\"") In my case, I get various error messages. If the path\\to\\Rscript.exe has spaces

Hi, I have a for loop to make 2 types of plots and I'd like to save one type of plots to a pdf file and the other to another pdf file. How can I control which plot will be saved to which pdf? Thanks -- Best, Zhenjiang

Hello,   I am trying to write some code that dumps R objects to the harddisk in a binary format so they can be quickly re-used later. Goal is to save time. The objects may be quite large (e.g. classes for a GUI). I was thinking that save() and load() would be suitable for this (until now I only thought it could be used for 'real' data, e.g. matrices, data.frames etc), but I am hoping any

Dear list, is there a way to open a .zip folder so that one can extract and modify files inside and then save teh .zip folder again? thanks! Jose -- Dr. Jose I. de las Heras Email: J.delasHeras at ed.ac.uk The Wellcome Trust Centre for Cell Biology Phone: +44 (0)131 6507095 Institute for Cell & Molecular Biology Fax: +44 (0)131 6507360 Swann Building,

I'm making tables for prediction results of classifiers (2 classes) that show the usual numbers, true positives, false positives, etc I used the command table(predictedLabels,realLabels) to make those. I just had a case though ,where one of the label vectors had only one class in it. This will result in only half a table. Compare: x<-c(1,1,1,0,0) y<-c(1,1,1,0,1) table(x,y) to

Hi, I was looking for a function like "which()" but only returns the first argument. Compare: x <- c(1,2,3,4,5,6) y <- 4 which(x>y) returns: 5,6 which(x>y)[1] returns: 5 which(x>y)[1] is exactly what i need. I did use this but the dataset is too big (~18 mio. Points). That's why i need a more effective way to get the first element of a vector which is

Hello everyone, I'm having a big trouble with which seems to be a bug in as.POSIXct() date-time conversion. I have massive GPS datasets in which each location has it's own date and time attribute. As I convert them to POSIXct format, 1300 cases (of about half a million locations) simply return NA values. I picked up a small sample of failed cases and normal cases to demonstrate the

Could someone explain to me what namespaces are loaded/saved when objects are saved? Specifically, I'm using this: save(list = ls(all.names = TRUE, envir = envir), file = name, envir = envir) to save out everything from an environment. Later, loading it on another machine, I'm surprised to see the load failing for being unable to load certain packages. Could anyone help me understand

Dear R-helpers, I created an own function which looks like this s_elternmz <- function(Var="balt") { Dg_a<-mz[,c("asbhh","apkz",Var)] colnames(Dg_a)[colnames(Dg_a)=="apkz"]<-"bpkzm" colnames(Dg_a)[colnames(Dg_a)==Var]<-paste(Var,"_m",sep="")

Folks: Say I have a set of histogram breaks: breaks=c(1:10,15) # With bin ids: bin_ids=1:(length(breaks)-1) # and some data (note that some of it falls outside the breaks: data=runif(min=1,max=20,n=100) *** What is the MOST EFFICIENT way to "classify" data into the histogram bins (return the bin_ids) and, say, return NA if the value falls outside of the bins. By classify, I mean

Hi, In short, I would like to know if there is any way to convert a numeric into a date, similar to how strptime() can convert a string to a date time class? There are some functions, etc. which don't work well with dates, and tend to force them into numerics. I understand that the number it spits back is the number of seconds since the beginning of 1970 (see the first few sentences

Are they the same with .RData being the newer format?? Thanks, ...Tao

On Sun, May 27, 2012 at 11:32 AM, Michael <comtech.usa@gmail.com> wrote: > Help! The R Console very quietly closed and exited without giving any > errors/warnings...after I loaded the RODBC library... > > Loading required package: RODBC > > > > > On Sat, May 26, 2012 at 10:27 PM, Michael <comtech.usa@gmail.com> wrote: > >> Hi all, >> >>