similar to: Mean calculation of groups

Dear Group, I want to do a t-test calculation on a large data set. I am pasting some part of it structure(list(Name = structure(c(1L, 1L, 1L, 1L, 1L, 1L, 3L, 3L, 3L, 3L, 3L, 3L, 3L, 2L, 2L, 2L, 2L, 2L, 2L, 2L, 2L, 2L, 2L, 2L), .Label = c("CTK100", "CTK103", "CTK121"), class = "factor"), Score = c(236.9726, 207.0055, 237.3464, 224.4774, 236.5034,

Hello, I have trouble with extracting Date string from my each row data. The date format I use is as the follows: ---------------------------------------------------------------------------- ----------- Index,Open,High,Low,Close # header 2011-11-01 9:00:00 ,248.50,248.95,248.20,248.70 ... .... ---------------------------------------------------------------------------- ----------- When I read

I've been running into a reproducible problem when using default LVM volume group names to present block devices for virtual machines in KVM, and I'm wondering why it is happening. On dom0 I make a default VolGroup00 for the operating system. I make a second VolGroup01 for logical volumes that will be block devices for virtual systems. In VolGroup01, I make two lv's for one system:

?Hola, Es más fácil que todo eso... Es que en tu fichero de entrada, la segunda fila son las unidades de las variables que tienes en la primera fila, pero "R" al leerlas las considera como un string que altera la clase de toda la columna cuando ésta es numérica. Simplemente eliminando esa segunda fila, las columnas acaban teniendo la clase que deben..

Hello, I would like to sync my Linux firewall to my Mac OS X. The Linux is a Debian 4.0 with ext3 filesystem (UTF-8) $ rsync --version rsync version 3.0.2 protocol version 30 The Mac OS X is a 10.5 Leopard with HFS+ (UTF-8) $ /sw/bin/rsync --version rsync version 3.0.3 protocol version 30 (fink version) I have many accents in my filenames: $ ls -l | tee filelist total 12 -rw-r----- 1 tamas

Hello All: This series is an update version of multiqueue virtio-net driver based on Krishna Kumar's work to let virtio-net use multiple rx/tx queues to do the packets reception and transmission. Please review and comments. Test Environment: - Intel(R) Xeon(R) CPU E5620 @ 2.40GHz, 8 cores 2 numa nodes - Two directed connected 82599 Test Summary: - Highlights: huge improvements on TCP_RR

Hello All: This series is an update version of multiqueue virtio-net driver based on Krishna Kumar's work to let virtio-net use multiple rx/tx queues to do the packets reception and transmission. Please review and comments. Test Environment: - Intel(R) Xeon(R) CPU E5620 @ 2.40GHz, 8 cores 2 numa nodes - Two directed connected 82599 Test Summary: - Highlights: huge improvements on TCP_RR

Hi, I''ve installed xen 3.0.3 from packages (xen-linux-system) on a debian etch, and i''ve configured it with network-bridge script in the default way (netdev=eth0, bridge=xenbr0, etc...) which is ok for me. the problem I have: I cannot ping any outer machine from dom0 (nor any outer machine can ping me). It gives me a "Destination Host Unreachable" message that