Re: [R] Performance issue with attributes

I know you already have a solution, but your original problem might have been that you needed attributes(Dataset1[[1]]) - i.e., double brackets, rather than attributes(Dataset1[1]) - Example: foo - data.frame(a=1:4, b=factor(letters[4])) attributes(foo[[2]]) $class [1] factor

Re: [R] Performance issue with attributes

Apologies for the late reply. I was out on vacation. I tried setattr() from data.table package and it worked like a magic. Thanks a lot for the help. setattr() is really faster than attributes. Regards, SG On 22 February 2014 12:29, Philippe Grosjean phgrosj...@sciviews.orgwrote: You can use

Re: [R] Performance issue with attributes

You can also upgrade to R-devel or to R 3.1.0 due out in a month or so -- those will run this code much more efficiently. Using setattr is OK if you really know what you are doing, but if you are not careful using it can modify objects you do not intend to modify. Best, luke On Tue, 11 Mar

[R] Performance issue with attributes

Hi All I am having problem running the 'attributes' command to set a attribute on each column of a large dataset. Dataset has 80 columns and 312407 rows. Its taking more than 60 seconds to set simple attributes like split=TRUE, usermissing=FALSE. Here is the source code, assuming Dataset1 is the

Re: [R] Performance issue with attributes

You can use setattr() in the data.table package. It can be used too on data.frames or other objects. Best, Philippe Grosjean On 22 Feb 2014, at 03:13, Smart Guy smartgu...@gmail.com wrote: Hi All I am having problem running the 'attributes' command to set a attribute on each column of a