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install.packages("swirl")
library(swirl)
swirl()
> ?mean > x <- c(0:10, 50) > x [1] 0 1 2 3 4 5 6 7 8 9 10 50 > xm <- mean(x) > xm [1] 8.75 > c(xm, mean(x, trim = 0.10)) [1] 8.75 5.50
> subset(statesInfo, state.region == 1)
X state.abb state.area state.region population income illiteracy life.exp murder
7 Connecticut CT 5009 1 3100 5348 1.1 72.48 3.1
19 Maine ME 33215 1 1058 3694 0.7 70.39 2.7
21 Massachusetts MA 8257 1 5814 4755 1.1 71.83 3.3
29 New Hampshire NH 9304 1 812 4281 0.7 71.23 3.3
30 New Jersey NJ 7836 1 7333 5237 1.1 70.93 5.2
32 New York NY 49576 1 18076 4903 1.4 70.55 10.9
38 Pennsylvania PA 45333 1 11860 4449 1.0 70.43 6.1
39 Rhode Island RI 1214 1 931 4558 1.3 71.90 2.4
45 Vermont VT 9609 1 472 3907 0.6 71.64 5.5
highSchoolGrad frost area
7 56.0 139 4862
19 54.7 161 30920
21 58.5 103 7826
29 57.6 174 9027
30 52.5 115 7521
32 52.7 82 47831
38 50.2 126 44966
39 46.4 127 1049
45 57.1 168 9267
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