The sealevel2 data frame has 81 rows and 3 columns.
The first two columns contain annual sea level maxima from 1912
to 1992 at Dover and Harwich respectively, two sites on the coast
of Britain.
The third column is a logical vector denoting whether or not the
maxima in a given year are assumed to have derived from the
same storm event; this assumption is made if the times of
obsevation of the maxima are at most 48 hours apart.
The row names give the years of observation.
There are 39 missing data values.
There are only nine non-missing logical values.
sealevel2This data frame contains the following columns:
A numeric vector containing annual sea level maxima at Dover, including 9 missing values.
A numeric vector containing sea annual level maxima at Harwich, including 30 missing values.
A logical vector denoting whether or not the maxima are assumed to have derived from the same storm event.