[R] pull stat out of summary
David L Carlson
dcarlson at tamu.edu
Sat Apr 1 01:58:34 CEST 2017
This is your answer:
Classes 'summaryDefault', 'table' Named num [1:6] -2.602 0.636 1.514 1.54 2.369 ...
..- attr(*, "names")= chr [1:6] "Min." "1st Qu." "Median" "Mean" ...
hold is a table of named numbers, i.e. a vector with a names attribute. It is not a data.frame so it does not have column names. The error message sort of tells you this when it says hold is an atomic vector (i.e. not a list or a data frame which are built from other objects such as vectors).
Texas A&M University
From: R-help <r-help-bounces at r-project.org> on behalf of Evan Cooch <evan.cooch at gmail.com>
Sent: Friday, March 31, 2017 6:11 PM
To: r-help at r-project.org
Subject: [R] pull stat out of summary
Continuing my learning curve after 25_ years with using SAS. Want to
pull the "Mean" forom the summary of something...
test <- rnorm(1000,1.5,1.25)
hold <- summary(test)
 "Min." "1st Qu." "Median" "Mean" "3rd Qu." "Max."
OK, so "Mean" is in there.
So, is there a short form answer for why hold$Mean throws an error, and
hold["Mean"} returns the mean (as desired)?
Silly question I know, but gotta start somewhere...
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