[R] summary stats on continuous data

[Matthew Finkbeiner]

Hi Daniel, thanks for your reply.  Unfortunately, that is not doing what I
need.  In the example I sent, there are three subjects (S1, S2 & S3).  Each
subject has 3 trials worth of data and each trial has 10 samples.  What I
want to return is the accuracy rate for each subject.  The answer is 66.6%
because in this toy example, each subject has 2 correct trials and 1
incorrect trial.

An easy way is to subset the dataframe into correct and incorrect sets for
each subject and then just take the number of correct trials
(length(unique(d$trial)) divided by total trials for that subject.  But
there must be a less clumsy way?  Especially since I need to do this many
times, not just for accuracy, but for other variables/codes in the real
dataset.

thanks again for any help

Matthew


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