lattice (version 0.16-2)

make.groups: 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(...)

Value

When all the input arguments are vectors, a data frame with two columnsdataall the vectors supplied, concatenatedwhichfactor indicating which vector the corresponding data value came fromWhen all the input arguments are data frames, the result of cbind applied to them, along with an additional which column as described above.

See Also

Lattice

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"))