search for: hcen

Hi, Is there a way to get the enclosing function name within a function? For example, I would like to have a function getEnclosingFunctionName(). It works like below f = function(){ print(getEnclosingFunctionName()) } f() # will print "f" Thanks Jeff

Hi, I have a data set similar to the following State Gender Quantity TX Male 1 NY Female 2 TX Male 3 NY Female 4 I need to calculate cumulative sum of the quantity by State and Gender. The expected output is State Gender Quantity CumQuantity TX Male 1 1 TX Male 3 4 NY Female 2 2 NY Female 4 6 I highly appreciate if someone can give me some hints on solving that in R. Hao -- View this

Hi, I have a vector with lots of NAs. e.g. vec = c(NA, NA, 2, NA, NA, 5, NA, 6, NA) > vec [1] NA NA 2 NA NA 5 NA 6 NA I would like to replace NAs with their immediately previous non NA number. After replacement, the above vector will become > vec [1] 0 0 2 2 2 5 5 6 6. I understand how to do that with a loop but the actual vector is very long and the loop takes too much time in R.

Hi, I would like to extract the last row of each group in a data frame. The data frame is as follows Name Value A 1 A 2 A 3 B 4 B 8 C 2 D 3 I would like to get a data frame as Name Value A 3 B 8 C 2 D 3 Thank you for your suggestions in advance Jeff

Hi, I have a a vector and a data frame with two columns vec = c("C", "A", "B") dataDF = data.frame(A1 = c("B", "A", "C"), A2 = c(1,2,3)) I would like to sort the data frame by column A1 such that the order of elements in A1 is as the same as in vec. After the ordering, the data frame would be A1 A2 C

Try to close the file on the first nfs client before reopening it on the second nfs client. NFS has something called "close-to-open cache consistency". This means that two clients which have the same nfs file open, cannot rely on seeing the updates from the respective other client. If one clients closes, and the other client opens thereafter, it should see the changes. If you want

Hi, I wonder how to have R automatically print stack trace produced by traceback upon errors during interactive uses. I tried the suggestions on http://old.nabble.com/Automatically-execute-traceback-when-execution-of-script-causes-error--td22368483.html#a22368775 and used options(error = recover) options(showErrorCalls = T) It just produces an extra message like "recover called

Hi, I currently combine multiple processed data (data frame) into a list and save the list as ".rda" using the save command. When new data come, I load the rda file, process the new data into a data frame, append the data frame to the end of the list, and save the whole list to the disk. The loading and saving steps are quite time consuming. Since I don't need to change the old data

Hi, I wonder how to pass several functions and their arguments as arguments to a function. For example, the main function is f = function(X ) { process(X) ... process(X) } I have a few functions that operate on X, e.g. g1(X, par1), g2(X, par2), g3(X, par3). par1, par2 and par3 are parameters and of different types.

Hi, I tried to load the package "kernlab" under R-v11 and R-v10, however it gave error message: Error in library.dynam(lib, package, package.lib) : shared library 'kernlab' not found In addition: Warning message: package 'kernlab' was built under R version 2.12.0 Error: package/namespace load failed for 'kernlab' Has anybody loaded this successfully before?

Hi, I would like to save a few dynamically created objects to disk. The following is the basic flow of the code segment for(i = 1:10) { m = i:5 save(m, file = ...) ## ??? } To distinguish different objects to be saved, I would like to save m as m1, m2, m3 ..., to file /home/data/m1, /home/data/m2, home/data/m3, ... I tried a couple of methods on translating between object names and

Hi, I wonder how to pass several functions and their arguments as arguments to a function. For example, the main function is f = function(X ) { process1(X) ... process2(X) } I have a few functions that operate on X, e.g. g1(X, par1), g2(X, par2), g3(X, par3). par1, par2 and par3 are parameters and of different types. I would like to pass g1, g2, g3 and their arguments to f and g1,

Hi, I wonder what is a better way to organize a lot of R source files. I have a lot of utility functions written and store them in several source files (e.g util1.R, util2.R,..utilN.R). I also have a master file in which the source command is used to load all the util.R files. When I need to use the utility functions in a new project, I create a new R file (e.g main.R) in which I

Hi, I have two questions on using the ff package and wonder if anyone who used ff can share some thoughts. I need to save a matrix as a memory-mapped file and load it back later. To save the matrix, I use mat = matrix(1:20, 4, 5) matFF = ff(mat, dim=dim(mat), filename="~/a.mat", overwrite=TRUE, dimnames = dimnames(mat)) To load it back, I use matFF2 = ff(vmode = "double",

...t; > Has anybody loaded this successfully before? Thanks, Yes, if it was built for R-2.11.x we were using R-2.11.x. I guess you are under Windows (unstated) where some infrastructure was changed form R-2.11.x to R-2.12.x and packages compiled for the latter won't work foer the former. hcen please run install.packages("kernlab") in order to get a version that fits to your R or even better upgrade your version of R. Uwe Ligges > Xiaoqi > > ______________________________________________ > R-help at r-project.org mailing list > https://stat.ethz.ch/mailm...

Hi, I am tackling a computing problem in R that involves large data. Both time and memory issues need to be seriously considered. Below is the problem description and my tentative approach. I would appreciate if any one can share thoughts on how to solve this problem more efficiently. I have 1001 multidimensional arrays -- A, B1, ..., B1000. A takes about 500MB in memory and B_i takes 100MB. I

Hi, I have been using filehash for a while. It has performed very well. However, recently I found filehash gives an error when I need to do something like db[c("a", "b")] when the db is in RDS format. Does any one know a way to get around that? The code below reproduces the error thanks Jeff filehashOption(defaultType = "DB1") dbCreate("mydb3", type =

Hi, I wonder anyone knows what causes the error message "select: bad file descriptor" in the multicore package. This error sometimes occurs and sometimes doesn't. I couldn't find any documentation on this error about this package. thanks Jeff

Hi, I have multiple responses y1, y2, .., yn, and would like to do linear regression for each of them with x1, x2, ..., xm. Instead of doing regression n times, it it possible to do it all at once? I tried lm(y1+y2 ~ x1 + x2 + x3) and lm added y1 y2 and then did the regression. thanks Jeff

Hi, I am writing a function in C that is meant to be called by R. In the C function, I used a gsl function gsl_stats_mean. The code is as simple as below void gsl(double *m, int *dim){ int r, c; r = dim[0]; c = dim[1]; double mean = gsl_stats_mean(&m[0], 1, r); Rprintf("mean = %f\n", mean); } The C code is succesfully compiled and the output is as follows. $ R CMD SHLIB