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Hi, I am trying to add a column of numbers to a data frame in R with multiple conditions. Here is a simplified example df: [A] [B] [C] [D] [E] [1] 1 X 90 88 [2] 1 Y 72 70 [3] 1 Z 67 41 [4] 2 X 74 49 [5] 2 Y 42 50 [6] 2 Z 81 56 [7] 3 X 92 59 [8] 3 Y 94 80 [9] 3 Z 80 82 I would like column [E] to have a certain value (found either in [C] or [D]) based on conditions in columns [A] *and* [B].

Is this even possible? I''ve got a ruby expression stored in a database, it''s the code to run a plugin since I was having trouble passing variables stored in the database. When I try to call the code, it either outputs it as text, or doesn''t display it at all. It''s supposed to generate an image and display it. right now the code is stored in the database as:

Full_Name: Eric Libby Version: 2.1.1 OS: OS Tiger Submission from: (NULL) (65.93.158.117) I am trying to analyze microarray data of 42 human arrays. I typed in the following instructions: library(affy) Data <-ReadAffy() eset <- expresso(Data, normalize.method="invariantset", bg.correct=FALSE, pmcorrect.method="pmonly",summary.method="liwong") And I get some

Just trying to run the example ***** require ''rubygems'' require ''mechanize'' a = WWW::Mechanize.new a.get(''http://rubyforge.org/'') do |page| # Click the login link login_page = a.click(page.links.text(/Log In/)) # Submit the login form my_page = login_page.form_with(:action => ''/account/login.php'')