summary.R

#
# shows minumum, maximum, mean, median, first (25%) and third (75%) quartiles. For
# factors (or categorical variables), it shows the frequency of every level.
#
# See also -> min, -> median, -> quantile, -> max
#

summary(c(  4, 9, 5, 1000, 11, 5, 8) )
#  Min. 1st Qu.  Median    Mean 3rd Qu.    Max.
#   4.0     5.0     8.0   148.9    10.0  1000.0

cat ("\n\n\n")

summary("Foo")
#  Length     Class      Mode
#       1 character character

cat ("\n\n\n")

# Summary of a Factor:
#
#   print Elements along with their frequency. (See also -> factor and -> levels)
summary (factor (c ( "foo", "bar", "bar", "foo", "foo", "baz")))
#  bar baz foo
#    2   1   3