search for: greggallen

Hi: I'm loading in students test scores with: > abntest <- read.table("scores.txt") if I type: >abntest I get ALL the values. I want to be able to filter it by various things such as: if( abntesr > 90) Print abntest; and other logical operators. I'm sure this is simple for someone experienced. Thanks, Gregg Allen

Hi: I have an array of measurements, that I've been doing linear regression model and AI models on. Because there are many errors and the values are "ill-formed" I would like to copy the array, but replace each value with the PERCENTILE of that value, in the original array. i.e. mesments$V1: 9, 77, -1 would become: mesmentsCopy$V1: 50, 100, 0 The actual array has many more

I have a function that is called from a "sourced" script, whenever certain conditions are met. I have this inside it: if(P > 0.9)save( file = today() , myLMSmodel ); This gives me files that look like this: Thu Jan 8 14:04:43 2009 That works fine on my Mac, but it would be much more convenient to have something like this: LMSMOD_Jan_08_09_1404 Does anyone know how I can do

Dear Sir or Madam: This is an extension to a earlier post, about looping through several thousand files, and testing student's models against a different data-set, called rclnow, for "recall now". The problem is, that the instructor never specified to the students, what they should name their "lm" object. So what they created was: "arbitrary variable name"

Hello! I'm using Mac OS X 10.4.11 on a G4. I use the "R" command, straight from a terminal, because the "GUI" is slower, and I've never liked GUIs anyway. I tried to set up my environment to use the vi editor, but it always tries to save it in wierd things like this: "/private/tmp/RtmpWIhhuo/41a7" 13L, 161C written Sure I can "cp" it from that

Dear R-Community: I am assisting a community college instructor in an introductory statistics class. He has asked me to do this: Read in a file, of filenames, line by line: Student_models.txt : (contains 1500+ filenames) ________________________ Experiment_name_student_name_date_time_Model_number_etc_etc Another_file_name_with_similar_info_as_above And_another And_another_one

Thanks to everyone who helped me when I was totally clueless. Now I'm only partially clueless, and in writing functions, which is major progress. This is a function that is a major improvement over which I was using MS Excel for: function() { files <- list.files(pattern="ABN*") # All the models start with the letters ABN for( i in 1:length(files)) # loop through the