Convert formulas into standard shapes
These functions convert formulas into standard shapes, including by incorporating a groups argument.
mosaic_formula( formula, groups = NULL, envir = parent.frame(), max.slots = 3, groups.first = FALSE ) mosaic_formula_q( formula, groups = NULL, max.slots = 3, groups.first = FALSE, ... )
formula |
a formula |
groups |
a name used for grouping |
envir |
the environment in which the resulting formula may be evaluated.
May also be |
max.slots |
an integer specifying the maximum number of slots for the resulting formula. An error results from trying to create a formula that is too complex. |
groups.first |
a logical indicating whether groups should be inserted ahead of the condition (else after). |
... |
additional arguments (currently ignored) |
mosaic_formula_q uses nonstandard evaluation of groups that may be
necessary for use within other functions. mosaic_formula is a wrapper
around mosaic_formula_q and quotes groups before passing it along.
mosaic_formula( ~ x | z )
mosaic_formula( ~ x, groups=g )
mosaic_formula( y ~ x, groups=g )
# this is probably not what you want for interactive use.
mosaic_formula_q( y ~ x, groups=g )
# but it is for programming
foo <- function(x, groups=NULL) {
mosaic_formula_q(x, groups=groups, envir=parent.frame())
}
foo( y ~ x , groups = g)Please choose more modern alternatives, such as Google Chrome or Mozilla Firefox.