D_make.groups {lattice}  R Documentation 
Grouped data from multiple vectors
Description
Combines two or more vectors, possibly of different lengths, producing a data frame with a second column indicating which of these vectors that row came from. This is mostly useful for getting data into a form suitable for use in high level Lattice functions.
Usage
make.groups(...)
Arguments
... 
one or more vectors of the same type (coercion is attempted if not), or one or more data frames with similar columns, with possibly differing number of rows. 
Value
When all the input arguments are vectors, a data frame with two columns
data

all the vectors supplied, concatenated
which

factor indicating which vector the corresponding
data
value came from
When all the input arguments are data frames, the result of
rbind
applied to them, along with an additional
which
column as described above.
Author(s)
Deepayan Sarkar Deepayan.Sarkar@Rproject.org
See Also
Examples
sim.dat <
make.groups(uniform = runif(200),
exponential = rexp(175),
lognormal = rlnorm(150),
normal = rnorm(125))
qqmath( ~ data  which, sim.dat, scales = list(y = "free"))