similar to: How do I delete multiple blank variables from a data frame?

I have a list called "tabs" that I would like to have the same structure as my list "eqSystem." The two look like they have the same format but they are different because when I look at their attributes, class(eqSystem[[1]]) is "call" but class(tabs[[1]]) is "formula". I want to have class(tabs[[1]]) as a call too. So what does "call" mean? And how

Hello R users! I have several data frames where some of the variables have many missing observations. For example, Q1 in one of my data frames has over 66% of its observations missing. I have tried imputation with mice but it does not work for all the data frames and I get the following message or a similar message to this: iter imp variable 1 1 Q1 Q2 Q3 Q4 Q5 Q6 Q7 Q8 Q9 Q10 Q11

Hello R Users! I have a data frame that has many variables, some with missing observations, and some that are correlated with each other. I would like to subset the data by dropping one of the variables that is correlated with another variable that I will keep int he data frame. Alternatively, I could also drop both the variables that are correlated with each other. Worry not! I am not deleting

Hello everyone! I have a data frame of 136 variables with 270 observations. I would like to create a new data frame such that each element of that data frame contains the maximum value of the 6 prior lags of the initial data frame. So for example, if my original data frame, A, were A1=c(7.72, 7.94, 7.56, 7.54, 0.93, 0.59, 7.21, 8.00, 7.19, 7.57)A2=c(4.27, 3.70, 3.80, 3.67, 3.83, 3.95, 4.02, 2.06,

Dear R users, I am using package mice and I am getting the error " Error in if (meth[j] != "") { : argument is of length zero." I have tried using several different versions of R (even the one that will be coming out this month) to no avail. I am using RStudio as my interface with R. Also note that I had run this a couple of days ago and it was working fine; I can't,

Hello! I would like to do some tables for several variables and I would like to write a loop that does the table for each variable. I should also point out that my data set has several missing observations and sometimes the observations that are missing are not the same for all my variables. What I would like to do: table(StoreData$CompanyID, !is.na(StoreData$P2))

Dear R users,I have a long program that I am trying to run--I am using RStudio as my interface with R. The pieces of the program run well individually but when I try to run everything in sequence it bogs down because of a warning after using rollmax from package zoo. Here is the warning: "In rollmax.zoo(zoo(Pmat), 7, na.pad = FALSE, align = "right") : na.pad is deprecated. Use

Dear List Members,I am trying to set up a large system of equations and I am trying to find a simple way to set up the list command under the package system fit. Here is the example from system fit and what I am trying to do: EQ1 <- Y1 ~ X1 + X2 + X4EQ2 <- Y2 ~ X2 + X3EQ3 <- Y3 ~ X2 + X3 + X4EQ4 <- Y4 ~ X1 + X3 + X4eqSystem <-list(form1 = EQ1, form2 = EQ2, form3 = EQ3, form4 = EQ4)

Hello everyone!I have a data set with missing observations that I am trying to impute. I am using MICE and I would like the imputed values to all be positive. I have two types of variables: prices (P1 to P136) and quantities (Q1 to Q136) and I also want the range of these two types to be different. Besides these variables. I am using the squeeze function but I am unable to set it such that I

Hello! Happy Valentine's Day... After I loaded the package lattice in R, it did not work. Then when I closed R and restarted it, R started with an error message and here is the feedback that I got from the R Console: Loading required package: Hmisc Loading required package: survival Loading required package: stats Loading required package: graphics Loading required package: splines Error in

Hello everyone, I am trying to figure out a way of replacing missing observations in one of the variables of a data frame by values of another variable. For example, assume my data is X X <-as.data.frame(matrix(c(9, 6, 1, 3, 9, "NA", "NA","NA","NA","NA", 6, 4, 3,"NA", "NA", "NA", 5, 4, 1, 3),

Dear Sirs/Madam, I am a beginner to R, and I am currently working on a data matrix which looks like this: > head(oligo) ko:K00001 ko:K00003 ko:K00005 ko:K00008 ko:K00009 ko:K00010 ko:K00012 AAA 370 631 365 67 164 455 491 KAA 603 1208 170 157 68

Hi! I''ve got a very strange problem. Suddenly the SQLite3 Backend stopped working. Example 1: > rake db:rollback == CreateProducts: reverting ================================================= -- drop_table(:products) rake aborted! An error has occurred, this and all later migrations canceled: SQLite3::SQLException: near "CASCADE": syntax error: DROP TABLE

Hi, I starting a new project, and have run into behavior I cannot replicate in irb, (i.e. outside of using rspec) when the directory? returns true, so I thought I''d ask here, in case any one has seen this badhavior. ruby-1.9.2-p136 rspec (2.5.0) rspec-core (2.5.1) rspec-expectations (2.5.0) rspec-mocks (2.5.0) When I try to run this spec: require Pathname(__FILE__).ascend { |d|

I''ve searched and search, tried a number of things like unstalling sqlite3 and reinstalling. Reinstalling Rails, building sqlite3 from source, etc. Nothing seems to work. When I try to start up my server I get the following: MacBook-Pro:splash Ross$ rails server /Volumes/Macintosh HD/Users/Ross/rails_projects/splash/json/ruby/1.9.1/gems/sqlite3-1.3.3/lib/sqlite3.rb:6:in

Hi there, I wanted to use RedCloth with my RubyOnRails 3 application, but it seems that RoR uses 1.9.2''s Psych by default as the YAML parser if available, and Psych fails to load the LaTeX entities file: ==================================================================== #ruby -v: ruby 1.9.2p136 (2010-12-25 revision 30365) [x86_64-linux] irb(main):001:0> Dir.pwd =>

I am an old, long time SAS programmer. I need to produce R code that processes a dataframe in a manner that is equivalent to that produced by using a by statement in SAS and an if first.day statement and a retain statement: I want to take data (olddata) that looks like this ID Day 1 1 1 1 1 2 1 2 1 3 1 3 1 4 1 4 1 5 1 5 2 5 2 5 2 5 2 6 2 6 2 6 3 10 3 10 and make it look like this: (withing each

Dear R help folks, First my apologizes for sending several related questions to the list server. I am trying to learn how to manipulate data in R . . . and am having difficulty getting my program to work. I greatly appreciate the help and support list member give! I am trying to write a program that will run through a data frame organized by ID and for the first line of each new group of data

What''s a good solution for fixing character encoding problems for compatibility between ascii and utf-8? The database is postgres and is encoded in utf-8. Once in awhile there will be a compatibility error from strings from a webform. Is there a command to fix this besides using a_string.force_encoding(''utf-8'')? Even this doesn''t seem to always work either.

Here I am, trying to learn TDD and BDD. Getting start, most simple case, and the world is falling apart: My test code: it "should respond with success" do puts ''hi'' # get :new # response.should be_success end My stack trace: $ rspec spec "controller: nil" F Failures: 1) VideosController new exposes request and response before and