numeric operations w/ lists
Suggestions: 1. Read the relevant sections of "An Introduction to R" and the R language definition to learn how to work with lists. 3. ?lapply to learn how to use the apply family on lists Hint: sapply(X,"-",y=Y) The above references will tell you what these hieroglyphics mean and what you get. Also why matrix(unlist(X)-Y,nr=65) gives you the same result. -- Bert Gunter Genentech Non-Clinical Statistics South San Francisco, CA "The business of the statistician is to catalyze the scientific learning process." - George E. P. Box
-----Original Message----- From: r-help-bounces at stat.math.ethz.ch [mailto:r-help-bounces at stat.math.ethz.ch] On Behalf Of Afshartous, David Sent: Tuesday, August 09, 2005 9:21 AM To: r-help at stat.math.ethz.ch Subject: [R] numeric operations w/ lists Hello all, X is a list of 20 lists, and each individual list has 65 elements. Y is a list of 65 elements. WANT: subtract Y from each of the 20 lists in X. Here's what I tried and the error messages:
X - rep(Y, 20)
Error in X - rep(Y 20) : non-numeric argument to binary operator I tried several methods w/o success. Any suggestions kindly appreciated. Thanks, Dave ps - please copy afshar at miami.edu in the reply, as I've had problems receiving the daily digest.
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