mdply {plyr} | R Documentation |
Call a multi-argument function with values taken from columns of an data frame or array, and combine results into a data frame
mdply(.data, .fun = NULL, ..., .progress = "none")
.data |
matrix or data frame to use as source of arguments |
.fun |
function to be called with varying arguments |
... |
other arguments passed on to .fun |
.progress |
name of the progress bar to use, see create_progress_bar |
The m*ply
functions are the plyr
version of mapply
,
specialised according to the type of output they produce. These functions
are just a convenient wrapper around a*ply
with margins = 1
and .fun
wrapped in splat
.
This function combines the result into a data frame. If there are no
results, then this function will return a data frame with zero rows and
columns (data.frame()
).
a data frame
Hadley Wickham <h.wickham@gmail.com>
mdply(data.frame(mean = 1:5, sd = 1:5), rnorm, n = 2) mdply(expand.grid(mean = 1:5, sd = 1:5), rnorm, n = 2) mdply(cbind(mean = 1:5, sd = 1:5), rnorm, n = 5)