October 2017
Beginner to intermediate
572 pages
26h 1m
English
book
Machine Learning with R Cookbook - Second Edition
by AshishSingh Bhatia, Yu-Wei, Chiu (David Chiu)
Content preview from Machine Learning with R Cookbook - Second Edition
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How to do it...
Perform the following steps:
-
To make the counting table, we first use the contingency table built with the inputs of the transmission type and number of forward gears:
> ftable = table(mtcars$am, mtcars$gear) > ftable Output: 3 4 5 0 15 4 0 1 0 8 5
- We then plot the mosaic plot of the contingency table:
> mosaicplot(ftable, main="Number of Forward Gears Within Automatic and Manual Cars", color = TRUE)
Number of forward gears in automatic and manual cars
- Next, we perform the Pearson's Chi-squared test on the contingency table to test whether the numbers of gears in automatic and manual transmission cars is the same: ...
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I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.