similar to: how to manipulate this data? Thank you very much!

Dear R experts: I have following data structure: student id, exam time and score. I want to create three new columes: 1 st before, 2nd before and 3rd before. For example, for student 1's 4th exam score is assumed to be influenced by his previous three cloest scores, which are 6, 9, and 10 in that order. For student 2's 5th exam score is assumed to be inflenced by her previous cloest

Hi, there, I have a simple data manipulation question for you. Thank you for your help! Suppose that I have this data about people appearing in a class Mary Mary Mary Sam Sam John John John John Then I want to find out what exact time(s) the student appears at the moment such as Mary 1 Mary 2 Mary 3 Sam 1 Sam 2 John 1 John 2 John 3 John 4 the fifth row shows tha Sam show the second times

Hello, I am working on some examples of GLMM for my students but I am afraid that my way of preparing a dataframe to pass to lmer will make them think that R is a very difficult and un-natural language. Here is for example a simple data set about approval ratings on two different surveys for a random sample of 1600 individuals. > ## Example: Ratings of prime minister (Agresti, Table 12.1,

I have time-series data on approval ratings of British Prime Ministers. The prime ministers dating from MacMillan onward till today are coded as dummy variables and the approval ratings are entered for each month. I want to know the mean value of the approval rating of each Prime Minister in the dataset and the approval rating during his/her first month and last month as PM. What R code should

I'm an R newbie but recently discovered the ggplot2 and reshape packages which seem incredibly useful and much easier to use for a beginner. Using the data from the IMDB, I'm trying to see how the average movie rating varies by year. Here is what my data looks like: > ratings <- read.delim("groomed.list", header = TRUE, sep = "|", comment.char = "")

Thanks for the links, I'll read them on my lunch break. I haven't heard much about whats coming.

I need to open the personal homepage function, thank you very much. My wiki account is: LostManiac thank you very much -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.centos.org/pipermail/centos-docs/attachments/20190730/8acc93d1/attachment-0006.html>

On Tue, 30 Jul 2019 at 07:03, lost maniac <maniac.cn at gmail.com> wrote: > > I need to open the personal homepage function, thank you very much. > My wiki account is: LostManiac > > thank you very much > _______________________________________________ > CentOS-docs mailing list > CentOS-docs at centos.org > https://lists.centos.org/mailman/listinfo/centos-docs

Because I am from China, this is the English name. Alan Bartlett <ajb at elrepo.org> ?2019?7?30??? ??10:42??? > On Tue, 30 Jul 2019 at 07:03, lost maniac <maniac.cn at gmail.com> wrote: > > > > I need to open the personal homepage function, thank you very much. > > My wiki account is: LostManiac > > > > thank you very much > >

Hi, I have a data set (data frame) describing some features of the students in a high school in the following format: Stu ID Year feature 1 feature 2 ............. 1001 1990 1001 1991 1001 1992 1002 1990 1002 1991 1002 1992 Some features of a few of these students are missing, I would like to

Hi, all When I type "xm list" command, It''s always display State is Blocked. During OS boot, State is Running, a few seconds later, State changes into Blocked and always Blocked. Why??? linux-jx4z:/ # xm list Name ID Mem VCPUs State Time(s) Domain-0 0 1317 2 r----- 75.5

Hello, I posted a question yesterday but I got no replies, so I'll try to reformulate it in a more concise way. I have the following data, summarizing approval ratings on two different surveys for a random sample of 1600 individuals: > ## Example: Ratings of prime minister (Agresti, Table 12.1, p.494) > rating <- matrix(c(794, 86, 150, 570), 2, 2) > dimnames(rating) <-

Hello everyone, I want to use a loop to load many files, each into a seperate variable (data.frames) and then - still in the loop - manipulate the present variable/data.frame. So far this works: for (i in 1:2){ var <- paste("var",i,sep="") fileName <- paste(i,"rating.txt", sep="_") assign(var, read.table(fileName)) But how can I now referr to var

Our school only offers Office 2010 pro for students. If I wanted to install it on a friends Ubuntu computer, would there be any possibility it would work on a 32bit system? http://appdb.winehq.org/objectManager.php?sClass=version&iId=17336 I noticed most people are using a trial version and not a CD installation with the full version. There might be a difference in the way it activates....

Dear R-help Listers, The following two student competitions are of interests to the now many student R package developers. I'd appreciate your help in spreading them. #1. John M. Chambers Statistical Software Award 2018 The Statistical Computing Section of the American Statistical Association announces the competition for the John M. Chambers Statistical Software Award. In 1998 the

It is just me or is the entire Wine AppDB screwed up? Why is it that people complain when no-cd fixes are used when a programs is rated platinum, yet when you need to set and use native dll's it's okay? It's either one or the other, for example why is MS Office 2007 rated platinum for? You need native dll's and not wines versions to run it, yet in games that use secu-rom or other

dear all, I want to make a dotplot with ratings from Items in 6 ItemsGroups. I reordered the items by rating within each group. I plotted the items by rating conditional on ItemGroup. The ordering works as I wanted but my y-aches labels (items) within each ItemGroup are now unequally spaced, e.g., in some panels there is a gap between one lower rated item and the next higher, to give a picture

Hi, I have a mysql table with fields userid,track,frequency e.g u1,1,10 u1,2,100 u1,3,110 u1,4,200 u1,5,120 u1,6,130 . u2,1,23 . . where "frequency" is the number of times a music track is played by a "userid" I need to turn my 'frequency' table into a rating table (it's for a recommender system). So, for each user, I need to categorise the frequency of tracks

This is the code if !params[:ratings].nil? params[:ratings].each_key do |r| @selected_ratings << r @movies << Movie.where(''rating = :rating'', :rating => r) @sort = params[:sort] end elsif @selected_ratings = @all_ratings @movies = Movie.order(@sort) @sort = params[:sort] end This is the error You have a nil object

Can someone tell me what I''m doing wrong? I''ve spent way too much time on this -------------------------------------------------------------------------------------- class Picture < ActiveRecord::Base has_many :ratings, :after_add => :increment_rating, :after_remove => :decrement_rating def increment_members(rating) self.rating += rating.amount save!