Dear John, note that you "Date" is a factor rather than some date object. If you convert it to some date object, just a few megabytes will suffice!
Best wishes, Uwe John wrote: > On Friday 28 March 2008 14:28, Daniel Nordlund wrote: >>> -----Original Message----- >>> From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] >>> On Behalf Of John >>> Sent: Friday, March 28, 2008 12:04 PM >>> To: r-help@r-project.org >>> Subject: [R] Error: cannot allocate vector of size 3.0 Gb >>> >>> Hello, >>> >>> I have read recent posts on this topic (Dr. Ronnen Levinson's Monday >>> 02:39:55 pm), but before I install a 64 bit system, and purchase more >>> RAM, I want to make sure I understand this interesting issue. >>> >>> I was attempting to plot a data frame containing Dow Jones stock > information: >>>> length(Date) >>> [1] 19957 >>> >>>> length(Close) >>> [1] 19957 >>> >>>> head(DowJones) >>> Date Open High Low Close Volume Adj.Close >>> 1 03/26/08 12531.79 12531.79 12309.62 12422.86 4055670000 12422.86 >>> 2 03/25/08 12547.34 12639.82 12397.62 12532.60 4145120000 12532.60 >>> 3 03/24/08 12361.97 12687.61 12346.17 12548.64 4499000000 12548.64 >>> 4 03/20/08 12102.43 12434.34 12024.68 12361.32 2078450000 12361.32 >>> 5 03/19/08 12391.52 12525.19 12077.27 12099.66 1203830000 12099.66 >>> 6 03/18/08 11975.92 12411.63 11975.92 12392.66 1263390000 12392.66 >>> >>>> tail(DowJones) >>> Date Open High Low Close Volume Adj.Close >>> 19952 10/08/28 240.17 243.33 237.72 239.55 3940000 239.55 >>> 19953 10/05/28 240.00 243.08 238.22 240.44 4360000 240.44 >>> 19954 10/04/28 237.75 242.53 237.72 240.00 4330000 240.00 >>> 19955 10/03/28 238.14 239.14 233.60 237.75 4060000 237.75 >>> 19956 10/02/28 240.01 241.54 235.42 238.14 3850000 238.14 >>> 19957 10/01/28 239.43 242.46 238.24 240.01 3500000 240.01 >>> >>>> plot(Date, Close) >>> Error: cannot allocate vector of size 3.0 Gb >>> >>> >>> >>> I currently have installed R 2.60, from source, onto Linux SuSE 10.2. I >>> >>> believe it is a 32 bit install: >>>> dmesg | grep bit >>>> ... >>>> hpet0: 3 32-bit timers, 25000000 Hz >>> I have 1GB of RAM, with circa 883.61 not allocated to hardware after >>> boot. I naively thought 19957 rows of data would be easily handled by a >>> fairly new computer. R was able to cease execution, and place control >>> back onto its interpreter, while a Chart attempt in OpenOffice locks up >>> OpenOffice. >>> >>> So, will installation of a 64 bit Operating System, and at least an >>> additional 1GB of RAM suffice to generate memory space for a 3.0 Gb >>> vector, in R? >> John, >> >> Am I missing something here? You have one 1 GB of RAM, you want to get a >> second 1 GB of RAM, and you want to know if you will be able to create a 3 >> GB vector? With or without a 64bit OS, I don't think you will be >> successful. In addition to total memory available, I believe you need to >> have sufficient contiguous memory to allocate an object. If memory is >> fragmented, you won't be able to create the vector, even if the total free >> space is sufficient. If I am incorrect, I'm sure someone will be along to >> correct me shortly. >> >> Hope this is helpful, >> >> Dan >> >> Daniel Nordlund >> Bothell, WA >> >> ______________________________________________ >> R-help@r-project.org mailing list >> https://stat.ethz.ch/mailman/listinfo/r-help >> PLEASE do read the posting guide >> http://www.R-project.org/posting-guide.html and provide commented, minimal, >> self-contained, reproducible code. > > > Hi Daniel, > > Thank you for the information. It has saved me from needlessly installing a > 64-bit linux instance. In the short term, I'll try and generate multiple > graphs, side by side. And purchase more RAM. A lot more. > > Enjoying the notion of multiple plots in R, > > John > > ______________________________________________ > R-help@r-project.org mailing list > https://stat.ethz.ch/mailman/listinfo/r-help > PLEASE do read the posting guide http://www.R-project.org/posting-guide.html > and provide commented, minimal, self-contained, reproducible code. ______________________________________________ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
