search for: veriables

Hi, how can i use operation + , - , / with veriable format DATES? for example i have two variable a <- 18/08/2008 and b <- 18/09/2010 and i want to calculate a-b ?? thank you? [[alternative HTML version deleted]]

Hello, I have a question regarding how to speed up the t.test on large dataset. For example, I have a table "tab" which looks like: a b c d e f g h.... 1 2 3 4 5 ... 100000 dim(tab) is 100000 x 100 I need to do the t.test for each row on the two subsets of columns, ie to compare a b d group against e f g group at each row. subset 1: a b d 1 2 3 4 5 ... 100000

I've tried various commands. ?plot, Teetor's book, "R Cookbook", and Mittal's book, "R Graphs Cookbook" without seeing how to write the command to create scatterplots from my data.frame. The structure is: > str(chemdata) 'data.frame': 14886 obs. of 4 variables: $ site : Factor w/ 148 levels "BC-0.5","BC-1",..: 104 145 126 115

I have a data set like the following: subject visit x1 1 1 0.5 1 2 1.2 1 3 0.7 2 1 0.4 2 2 0.6 2 3 1.0 ..... where x1 is the interval between the two visits. Now I want to calculate the cumulative intervals since the beinging, for example subject visit x1 cum 1 1 0.5 0.5 1 2 1.2 0.5+1.2 1 3 0.7 0.5+1.2+0.7 2 1 0.4 0.4 2 2 0.6 0.4+0.6 2 3 1.0 0.4+0.6+1.0 ..... is there an easy to generate the

I have been using samba for a while now with great sucesses it has replaced my Windows 2000 server completely, I am using a mix of windows98, 2000 and XP with no problems. However i would like to do two things, 1) print samba veriables to a log file in a location of my choice 2) When a windows test user logs on, i would like to display a windowed dialog box showing the verious samba veriable stats. Can this be down without melting my brain, I have tried verious options without much sucsess. Just for refernace here is my curren...

Ok. I'm configuring my iptables scripts so that specific iptables rules for virtual network interfaces used for tinc go on tinc-up-fw and tinc-down-fw custom scripts. When I reload iptables rules manually to apply changes iptables scripts flush all chains and reapply rules and now also search in /etc/tinc/<netname>/ directories if the related virtual network interface is up and running

I just started messing with puppet, and i love it! I have used cfengine in the past, and were in process of planing to replace cfengine now. One thing thats stumped me this weekend and i know i read your working on virtal defines so i can''t do that, but how can i get arond this issue with the curretn setup. I think i am missing something fundamentally simple here. i have this

Hi, I have a problem with running puppet with hiera based data. I am trying to cleanup user accounts on a range of servers (to have the same uid/gid). When I create existing account but with different uid/gid it doesn''t change files group ownership so I need to run a script which cleanups after cleanup ;-) I use the following code: --- :backends: - yaml :hierarchy: -

Dear all, We compared the gene expression level in two conditions: high (H) and low (L), using real-time PCR. We had 3 samples of each condition, and we quantified each sample twice (i.e. a technical replication). Our data looks like: H1 H1 H2 H2 H3 H3 L1 L1 L2 L2 L3 L3 We want to test if the level in H vs L is significantly different. I would like to use ANOVA and I guess a nested model with

Ben wrote: > API is your friend. > http://api.rubyonrails.org/classes/ActionController/Streaming.html#M000091 > send_file I put this code block in files_controller.rb def send_file(path, options = {}) #:doc: raise MissingFile, "Cannot read file #{path}" unless File.file?(path) and File.readable?(path) options[:length] ||= File.size(path)

Yes, I know it is possible to insert iptables rule also without interface presence, but I never tested. If you tell this I trust your experience, but I prefer to have clean system configuration, so all is linked to something, without leaving unused system configuration, mainly for security components, also our firewalls have complex configuration, but using this dynamic management leave persistent

Hola, que tal? Tendo una duda, como se puede eliminar una variable de un data.frame? Tambien tengo otra duda, tengo una base de datos importada del spss, donde tengo espacios asignados como missings, pero al pasarlo al R, me coje los espacios como una categoria más. Como los puedo poner como missings? Dolors Giralt _________________________________________________________________ [[elided