Hi all, I have 2 data frames the first contains a list with repeats of words and an associated response time (RT) measure for each word. The second is a tabulation of each unique word and other information such as the amount and of responses for each word. I need to determine the mean RT for each word and add that as a column in the second data frame. Any help would be appreciated Cheers Lee
Data frame 1 > head(alldat) s expt session cycle trial left.right freq concr word rt resp Response correct corrResp 121 1a a 1 C1 1 1 lf hc pianist 1529 old hi FALSE new 122 1a a 1 C1 2 1 hf hc sweat 1518 new hi TRUE new 123 1a a 1 C1 3 1 lf lc carnage 1046 old hi TRUE old 124 1a a 1 C1 4 1 lf hc nymph 1142 old hi TRUE old 125 1a a 1 C1 5 1 hf lc hank 1487 new hi TRUE new 126 1a a 1 C1 6 1 lf hc waist 1199 new hi TRUE new respType 121 s 122 s 123 s 124 s 125 s 126 s > Data frame 2 > head(CCCW) FALSE TRUE CC propCC lo hi abode 2 11 TRUE 0.8461538 4 9 abyss 1 12 TRUE 0.9230769 2 11 accord 2 11 TRUE 0.8461538 2 11 account 0 0 FALSE NaN 0 0 acre 4 9 TRUE 0.6923077 4 9 adage 0 0 FALSE NaN 0 0 ______________________________________________ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.