coercing
NA
Inf
c( )
seq()
:
rep()
matrix()
data.frame()
data.frame
plot()
ggplot
ggplot2
ToothGrowth
color=
shape=
stat_summary()
geom_col()
fill
color
dodge
stack
position = position_dodge()
dose
factor
Tidy Data
geom_boxplot()
factor()
head()
str()
nls()
facet
for()
select()
filter()
subset()
group_by
summarise
Cd
Zn
inner_join()
join
%>%
lubridate
Date
date-time
?strptime
We have finished a nice book.