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5 results for “from:Dylan Arena”

How to subset a data frame to include only first events
Dylan Arena · Feb 4, 2013 · r-help

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How to subset a data frame to include only first events
Dylan Arena · Feb 4, 2013 · r-help

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Is there a facility in R similar to MatLab "syms" that allows using unevaluated numeric symbols in matrices?
Dylan Arena · Jul 18, 2007 · r-help

Hi, I'm trying to use R to get eigenvalues and eigenvectors of a matrix whose elements are of the form (2 * lambda), -(lambda + mu), etc. I'd like R to treat this matrix as a numeric matrix without treating...

Trouble with R CMD check: I can't seem to get dependencies right (maybe I'm using R_LIBS incorrectly?)
Dylan Arena · Sep 4, 2008 · r-help

Hi there, I'm in the following directory: ~/Documents/Rstuff/diceFiles/dice_1.1 The directory "dice" is in this directory, with all the usual build files (DESCRIPTION, NAMESPACE, etc). I'm trying to run the following command: R CMD...

Is there a quick way to count the number of times each element in a vector appears?
Dylan Arena · Mar 5, 2007 · r-help

Hi there, I'm writing a function that calculates the probability of different outcomes of dice rolls (e.g., the sum of the highest three rolls of five six-sided dice). I'm using the "combinations" function from the "gtools...

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