cortab {plm}

Cross–sectional correlation matrix

Description

Computes the cross–sectional correlation matrix

Usage

cortab(x, grouping, groupnames = NULL, value = "statistic", ...)

Arguments

x

an object of class pseries

grouping

grouping variable,

groupnames

a character vector of group names,

value

to complete,

...

further arguments.

Value

A matrix with average correlation coefficients within a group (diagonal) and between groups (off-diagonal).

Examples

data("Grunfeld", package = "plm")
pGrunfeld <- pdata.frame(Grunfeld)
grp <- c(rep(1, 100), rep(2, 50), rep(3, 50)) # make 3 groups
cortab(pGrunfeld$value, grouping = grp, groupnames = c("A", "B", "C"))