Message-ID: <1356376908783-4653889.post@n4.nabble.com>
Date: 2012-12-24T19:21:48Z
From: jenna
Subject: apply with missing values
I am trying to get the means of each participants avg saccade amplitude as a
function of the group they were in (designated by "shape_"), but there are
missing values in the dataset....this is what i tried...
with(data055,tapply(AVERAGE_SACCADE_AMPLITUDE,shape_,mean))
i get an error saying the argument is not numerical or logical
next i try...
> 055 <- tapply(data055$AVERAGE_SACCADE_AMPLITUDE,
+ data055$shape_,mean, na.rm =TRUE)
still nothing....
help? thanks!
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