GLDEX: fun.mApply – R documentation

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fun.mApply

Applying functions based on an index for a matrix.

Description

This is a generic function that can be used to find mean, variance, sum or other operations according to some index imposed on the matrix or vector.

Usage

fun.mApply(X, INDEX, FUN = NULL, ..., simplify = TRUE)

Arguments

`X`	Matrix with n rows.
`INDEX`	Vector or list of vectors of length n.
`FUN`	Function to operate on submatrices of `X` by `INDEX`
`...`	Arguments to function.
`simplify`	Set as `TRUE` by default, see `sapply` fo details.

Value

If FUN returns more than one number, fun.mApply returns a matrix with rows corresponding to unique values of INDEX.

Author(s)

Tony Plate

Examples

# Finding the row medians of a matrix (matrix(1:20,nrow=5))
fun.mApply(matrix(1:20,nrow=5),list(1:5),median)

GLDEX

Fitting Single and Mixture of Generalised Lambda Distributions (RS and FMKL) using Various Methods

v2.0.0.7

GPL (>= 3)

Authors

Steve Su, with contributions from: Diethelm Wuertz, Martin Maechler and Rmetrics core team members for low discrepancy algorithm, Juha Karvanen for L moments codes, Robert King for gld C codes and starship codes, Benjamin Dean for corrections and input in ks.gof code and R core team for histsu function.

Initial release

2020-02-04