search for: nwstephen

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2010 Jun 14
2
Large Data
HI, I want to import 1.5G CSV file in R. But the following error comes: 'Victor allocation 12.4 size' How to read the large CSV file in R . Any one can help me? -- View this message in context: http://r.789695.n4.nabble.com/Large-Data-tp2254130p2254130.html Sent from the R help mailing list archive at Nabble.com.
2010 Jun 04
1
What is the largest in memory data object you've worked with in R?
For me, I've found that I can easily work with 1 GB datasets. This includes linear models and aggregations. Working with 5 GB becomes cumbersome. Anything over that, and R croaks. I'm using a dual quad core Dell with 48 GB of RAM. I'm wondering if there is anyone out there running jobs in the 100 GB range. If so, what does your hardware look like? --Nathan [[alternative HTML
2010 Jan 18
0
R jobs keep hanging linux server despite mem.limits modifcations
My group is working with datasets between 100 Mb and 1 GB in size, using multiple log ins. From the documentation, it appears that vsize is limited to 2^30-1, which tends to prove too restrictive for our use. When we drop that restriction (set vsize = NA) we end up hanging the server, which requires a restart. Is there any way to increase the memory limits on R while keeping our jobs from
2012 Jul 27
1
Eleaps in package subselect crashes when using include arguement
I'm using eleaps to build a forward selection algorithm iteratively, but the program unexpectedly crashes. In fact, it completely closes my session in RStudio. The first 39 steps work fine, but on the 40th step, it unexpectedly stops with no errors. I've isolated the error to the code snippit below. There are 39 predictors, and I'm searching for the 40th best. I've passed in a
2010 Jan 19
2
Server hanging despite efforts to correct memory limits
My group is working with datasets between 100 Mb and 1 GB in size, using multiple log ins. From the documentation, it appears that vsize is limited to 2^30-1, which tends to prove too restrictive for our use. When we drop that restriction (set vsize = NA) we end up hanging the server, which requires a restart. Is there any way to increase the memory limits on R while keeping our jobs from
2012 May 17
3
Optimization inconsistencies
I have a very simple maximization problem where I'm solving for the vector x: objective function: w'x = value to maximize box constraints (for all elements of w): low < x < high equality constraint: sum(x) = 1 But I get inconsistent results depending on what starting values I. I've tried various packages but none seem to bee the very solver in Excel. Any recommendations on