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Hello, Recently I have been trying to open a huge database with no success. It’s a 4GB csv plain text file with around 2000 rows and over 500,000 columns/variables. I have try with The SAS System, but it reads only around 5000 columns, no more. R hangs up when opening. Is there any way to work with “parts” (a set of columns) of this database, since its impossible to manage it all

Hi If I have a <- Inf + 1i then Re(a) is Inf, and Im(a) is 1, as expected. But if b <- 1 + Inf * 1i, then Im(b) = Inf , as expected, but Re(b) = NaN, which I didn't expect. Why this asymmetry? How to define an object with Re(b)=1, Im(b)=Inf? -- Robin Hankin Uncertainty Analyst Southampton Oceanography Centre European Way, Southampton SO14 3ZH, UK tel 023-8059-7743

...ttp://www.nabble.com/Variable-Selection-for-data-reduction-and-discriminant-anlaysis-tp19591270p19602702.html Sent from the R help mailing list archive at Nabble.com. ------------------------------ Message: 54 Date: Mon, 22 Sep 2008 08:50:21 +0200 From: " Jos? E. Lozano " <lozalojo@jcyl.es> Subject: [R] Manage huge database To: <r-help@stat.math.ethz.ch> Message-ID: <47A455630022D55E@mtacsbs.csbs.jcyl.es> (added by postmaster@jcyl.es) Content-Type: text/plain Hello, Recently I have been trying to open a huge database with no success. It’s a 4GB csv plain...

Hello, I'm facing a problem of optimization, I've already solved but I'm trying to find other answers to this problem to improve the solution. Well, to make it short: I have to set/install a number of devices in a building, and I have to give service to a number of "customers", or better say, to give a good quality of the signal. The more devices I place, the higher the