similar to: Test (PR#6485)

well, sure diff() does it thanks alot Thomas > -----Message d'origine----- > De: Liaw, Andy [mailto:andy_liaw at merck.com] > Date: mardi 27 juillet 2004 16:50 > ??: 'Dewez Thomas'; 'r-help at stat.math.ethz.ch' > Objet: RE: [R] computing differences between consecutive > vectorelements > > > Not exactly sure what you want, but seems like you can

Hello, I'm trying to run a lagsarlm (maximum likelihood estimation of a spatial lag model) in the spdep library ; but R gives following error message: Error in solve.default(inf, tol = tol.solve) : system is computationally singular: reciprocal condition number = 4.20137e-12 I get the same message when I try to run de lagsarlm with a bigger data set (4333 regions). The command

Dear R-users, I am a newbie to R so please excuse this naive question for which I couldn't seem to find online answers. I have this data frame containing a series of locations through time (x,y,z,t). I would like to compute the difference in x, y and z between t-1 and t. Sounds easy enough, but how on earth does one loop through vector elements and compute this difference? Thanks Thomas

Dear all, I would like to implement a spatial quantile regression using instrumental variable estimation (according to Su and Yang (2007), Instrumental variable quantile estimation of spatial autoregressive models, SMU economics & statistis working paper series, 2007, 05-2007, p.35 ). I am applying the hedonic pricing method on land transactions in Luxembourg. My original data set contains

Hello, (Saddened for my bad English) I have just created a script to install NUT I manage the events with UPSSCHED and I would like to know how to launch this command via /etc/nut/upssched-cmd every 5 minutes to verify the level of battery of the UPS and decide on the action to be run. Is there an option in the configuration which I was able to forget? Other question : there is another command

Hi, I''ve started to implement page caches but I''ve hit a brick wall getting a sweeper to clear the cache when needed. It seems that any models that I tell it to observe aren''t being observed properly. If I add the sweeper to a controller the initialize method runs, but no matter what I do the after_save/after_update callbacks aren''t running. Also if I try to

Hi, I could try latest 7zip (4.57) on a triple boot machine (Debian SID i386, x86_64 and native Windows XP SP2), and found something surprising in the results : amd64 at 2400MHz linux32 -> 1814 linux64 -> 1946 win32 -> 2004 So performance is much better in Linux 64 bit than in 32 bit, while both are slower than native windows system. Is it normal, I mean does anyone else obtain

I''m using a cache sweeper class [1] to take care of some pretty complex sweeping. However, there is a problem with the current implementation. Namely, the sweeper gets called only when an action named in cache_sweeper is called using GET. As many methods where sweeper would be useful are using postback to send the form to the same action, this causes the cache to get swept when

Hi I''m working on a program which relies on heavy cache sweeper usage. I''ve just bumped onto an odd problem. When using render_component method in layouts or templates with cache sweeping turned on, Rails throws an exception with the following message: NoMethodError in TestController#index You have a nil object when you didn''t expect it! The error occured while

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Hi, With the aim of being able to integrate machines Windows 7 into a domain Samba, I try at present to compile the version 3.5.2 under Debian Lenny According to doc: http://www.samba.org/samba/docs/man/Samba-HOWTO-Collection/compiling.html ... And I obtain the following error during the execution of the make: Linking libsmbclient shared library bin/libsmbclient.so

Hello Is there a tool or a technical which would allow to convert a VM of Xen Open Source to the format OVF? Thank you for your returns Cordially -- Matthieu ROUDON Technicien Informatique Direction des Systèmes d''Information Institut d''Etudes Politiques de Grenoble Unité Mixte de Recherche PACTE - UMR 5194 Tél: 04 76 82 83 64 courriel: Matthieu.Roudon@iepg.fr

Bonjour, Est ce qu''une ressource parmi vous a déjà effectuer une migration de machine virtuelle de XEN vers XENSERVER? J''aimerai changer de serveur en migrant toutes mes VM du serveur xen vers le serveur xenserveur. Est ce que des personnes ont déjà effectuer ce genre de migration? Si oui comment avez vous procéder? D''avance merci pour vos nombreaux retour. Cdlt.

I created a sweeper ItemSweeper and saved it in app/models/item_sweeper.rb. Then I put this in my item_controller.rb: cache_sweeper :item_sweeper, :only => [:create, :destroy, :update] But now when I call the view action, I get this error: ActionView::TemplateError (undefined method `title'' for nil:NilClass) on line #5 of app/views/item/view.rhtml: 5: <H1

I''m having a bear of a time getting my cached pages to expire. Maybe one of you guys can help me out. I''ll show my sweeper and then my log to show that it "should" be working. class PragmaticSweeper < ActionController::Caching::Sweeper observe Comment def after_save(comment) expire_page(comment.post_id) end private def expire_page(post_id)

For example - i have a sweeper for one model(in this case About). class AboutSweeper < ActionController::Caching::Sweeper observe About def after_create(data) expire_about(data) end def after_save(data) expire_about(data) end def after_destroy(data) expire_about(data) end def expire_about(data) FileUtils.rm_rf

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Hi, I'am using a Maildir++ based quota setting which creates a maildirsize file in every Maildir. The first two lines of this file are the maximum quota in bytes then the actual consumption in bytes and number of messages, like so : 1073741824S 379317999 5169 This means this user has a quota of 1Gb and he is using ~ 379 Mb (you have to divide by 1024 to be more precise) Since the

Dear R-users, I've spent most of the day reading R documentation at length but couldn't find something perhaps obvious. I have a dataset made of 3 morphometric variables for a series of watershed [log(slope); log(drainage_area); distance_to_outlet] My aim is to predict the value of log(slope) for pairs of [drainage_area; distance_to_outlet] (sounds like a plain linear model fitting,

I''ve enabled page caching on a site I''m currently constructing. The sweeper is called upon any changes made to the model, as expected. The sweeper code is as follows: class PersonSweeper < ActionController::Caching::Sweeper observe Person def after_update(person) expire_staff_page end def after_destroy(person) expire_staff_page end def