Re: [R] Memory usage in read.csv()

Hi Jim & Gabor - Apparently, it was most likely a hardware issue (shortly after sending my last e-mail, the computer promptly died). After buying a new system and restoring, the script runs fine. Thanks for your help! On Tue, Jan 19, 2010 at 2:02 PM, jim holtman - jholt...@gmail.com <+nabble+m

[R] Memory usage in read.csv()

I'm sure this has gotten some attention before, but I have two CSV files generated from vmstat and free that are roughly 6-8 Mb (about 80,000 lines) each. When I try to use read.csv(), R allocates all available memory (about 4.9 Gb) when loading the files, which is over 300 times the size of the ra

[R] [Lattice] panel.levelplot - shrink argument to highlight absolute z-values

Hi - I have a levelplot with positive and negative z-values. I'd like to scale the levelplot rectangles proportional to the *absolute* z-values to highlight the z-value extremes (while retaining the color difference to track the positive/negative attribute). I've likely missed something in the

Re: [R] Feature request for as.Date() function

On Thu, Nov 26, 2009 at 12:08 AM, jim holtman - jholt...@gmail.com <+nabble+miller_2555+9dc9649aca.jholtman#gmail@spamgourmet.com> wrote: > An easy way is just to write your own function that will accept "NA", > convert it to NA and then call as.Date. > I have written such a function, which ha

Re: [R] Feature request for as.Date() function 20)

An easy way is just to write your own function that will accept "NA", convert it to NA and then call as.Date. R is a functional language, so write some functions. Don't try to overload existing functions with new options that may break a lot of existing code. If you have special requirements, th

Re: [R] Feature request for as.Date() function 20)

On Wed, Nov 25, 2009 at 2:56 PM, jim holtman - jholt...@gmail.com <+nabble+miller_2555+9dc9649aca.jholtman#gmail@spamgourmet.com> wrote: > Seems to work fine in my testing: > > PLEASE do read the posting guide http://www.R-project.org/posting-guide.html > and provide commented, minimal, self-co

[R] Feature request for as.Date() function

Hello - I have a csv file with a few date columns. Some of the records have an "NA" character string instead of the date. When I attempt to use read.csv() and typecast the columns using colClasses, I receive the following error: Error in charToDate(x) : character string is not in a stand

Re: [R] Applying do.call to a data.frame using function arguments (nabble: message 8 of 20)

On Wed, Aug 26, 2009 at 12:47 PM, hadley wickham - > I think you're missing some quotes: > cat(do.call("paste",c(x2,sep='","'))[1], "\n") Thanks - the strings are actually substrings of larger strings (specifically, SQL statements), which will wrap with the leading and trailing quotes (though I sh

[R] Accessing list object from within a function as a list element

Hi - I have a list (call it 'mylist') with the following elements: (i) a function (call it 'myfunc' and expressed as 'mylist$myfunc') and (ii) a variable (call it 'myvar' and expressed as 'mylist$myvar'). Since I use mylist as a pseudo-class (I assign mylist to multiple different R objects), I wou

[R] Passing arguments to forked children

Hi - I have attempted to use the fork::fork() function to perform parallel processing. However, the child R function called needs to know a given set of parameters to complete its task. Specifically, I iterate through a vector, and output values based on the elements of that vector to a databa