similar to: Just back in town

I'm trying to prepare some cross tabs, looking at a number of variables against a variable "connector" which has 2 values: "OD Passenger" and " Connector". When I produce a xtabs one way I have observations under "Connector" but against a different variable "Connector" shows all 0 values. What is wrong? I've looked into the na commands

I presume the behavior below (no Connector values in the second table) is because I have na values in my dataframe. How do I get them to list? I found references to na.action and na.pass, but I could not figure out how I could use them with xtabs to list the na as a value. I'm sure there's a simple syntax I need, but it's not obvious to me. > # Weighted Data

Rowland Penny schrieb am 28.03.2015 10:30: > I do not understand how you managed to install libgnutls-dev in the > first place, when I try to install it, I get: Well, it has been about a year ago, when I installed my servers. And by then libgnutls-dev had been available without any problem. Maybe there are some remnants on the system - I frankly don't know. I will definitely try

Are there any service providers offering Cape Town DID's? -- - Eric Smith

I will be out of town until November 15. I will be checking my email a couple of times a day while I''m away. -Tom -- Tom Eastep \ Nothing is foolproof to a sufficiently talented fool Shoreline, \ http://shorewall.net Washington USA \ teastep@shorewall.net

Hey you guys, ok I have been trying to get The Sims 3 base game running on my Lenovo L512 on Ubuntu 10.04 for several months now and I just don't seem to be successful. So I was hoping, maybe you can help me out on this one: I installed it using PlayOnLinux (v. 3.8.8) which installs Wine 1.3.4, I run the game on Wine 1.2.1 (since thats the working Version, see here:

I''m trying to dynamically create an instance of an object at runtime, from a String. I have a method that returns one of a number of Strings ("Car", "Motorcycle", "Bicycle"), and when I receive the String, I then want to instantiate one of those objects. Seems like there should be a way to do it in Ruby, but maybe I''ve been up too long --

Hello, Using base R only, the following seems to do what you want. with(mydf, ave(speed, date_time, type, FUN = weighted.mean, w = n_vehicles)) Hope this helps, Rui Barradas Em 09-11-2017 13:16, Massimo Bressan escreveu: > Hello > > an update about my question: I worked out the following solution (with the package "dplyr") > > library(dplyr) > > mydf%>% >

hi all I have this dataframe (created as a reproducible example) mydf<-structure(list(date_time = structure(c(1508238000, 1508238000, 1508238000, 1508238000, 1508238000, 1508238000, 1508238000), class = c("POSIXct", "POSIXt"), tzone = ""), direction = structure(c(1L, 1L, 1L, 1L, 2L, 2L, 2L), .Label = c("A", "B"), class =

Dear all, We are looking for bright and motivated candidates to join our pharmacometric modelling team at the University of Cape Town. Pharmacometrics is an emerging discipline that uses mathematical and statistical tools to quantify drug, disease, and trial information to aid efficient drug development and/or regulatory decisions. It designs and applies mathematical models to describe the

Dear all, Our pharmacometrics group is looking for bright and motivated candidates to join our modelling team within the Division of Clinical Pharmacology at the University of Cape Town. Our group has established PK/PD modelling expertise in the disease areas of tuberculosis, HIV, and malaria. It is active internationally and enjoys on-going collaborations and exchange programs with some of the

> On 9 Nov 2017, at 14:58, PIKAL Petr <petr.pikal at precheza.cz> wrote: > > Hi > > Thanks for working example. > > you could use split/ lapply approach, however it is probably not much better than dplyr method. > > sapply(split(mydf, mydf$type), function(speed, n_vehicles) sum(mydf$speed*mydf$n_vehicles)/sum(mydf$n_vehicles)) > gives you averages > The

Hello an update about my question: I worked out the following solution (with the package "dplyr") library(dplyr) mydf%>% mutate(speed_vehicles=n_vehicles*mydf$speed) %>% group_by(date_time,type) %>% summarise( sum_n_times_speed=sum(speed_vehicles), n_vehicles=sum(n_vehicles), vel=sum(speed_vehicles)/sum(n_vehicles) ) In fact I was hoping to manage everything in a

Dear all, at the Division of Clinical Pharmacology at the University of Cape Town (South Africa) we are looking for highly motivated science/engineering PhD graduates to join our pharmacometrics group as a post-doctoral fellow. Pharmacometrics is an emerging discipline that applies mathematical modelling and simulation to pharmacology, aiding the interpretation of data from clinical trials,

Hi, I use two similar scripts to put p-values of shapiro.test and, respectively, of wilcox.test in a table: a) d <- data.frame(dataset$GroupFactor, dataset[2:11]) # p-values for the shapiro test (by levels of GroupFactor) with(d, aggregate(d[,-1], list(d[,1]), FUN = function(x) shapiro.test(x)$p.value)) b) d <- data.frame(dataset$GroupFactor, dataset[2:11]) with(d, aggregate(d[,-1],

I''m heading out of town, but had a quick thought I wanted to share. Rather then using ambiguous named request helpers in controller specs like "do_request", I''ve been using more readable helpers like "post_create". For example... describe ProjectController do def post_create post :create, ... end before do end it "creates a new

Hi Thanks for working example. you could use split/ lapply approach, however it is probably not much better than dplyr method. sapply(split(mydf, mydf$type), function(speed, n_vehicles) sum(mydf$speed*mydf$n_vehicles)/sum(mydf$n_vehicles)) gives you averages aggregate(mydf$n_vehicles, list(mydf$type), sum)$x gives you sums Cheers Petr > -----Original Message----- > From: R-help

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-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 Is it possible to setup wine without a Windows partition? I have a Debian 2.2-r2 system and want to run a few Windows apps, mostly games, but don't want to go through all the bs of resizing a partition, creating a new one and putting Windows on my laptop. Any chance of being able to do it without a dedicated partition? - -- Darryl L. Pierce

hi, i have a noob question. how do i create a table but add additional fields? for example.. i have a total_table of total, county, and town where total_table inherites county_id and town_id from my town_county table where county_id has_many towns. in my view, id like to go through the hash like this table total_table for total_table.county { print total_table.county print