cacIRT (version 1.0)

tif: Test information function

Description

modified from irtoys

Usage

tif(ip, x)

Arguments

ip

x

Value

Examples

##---- Should be DIRECTLY executable !! ----
##-- ==>  Define data, use random,
##--	or do  help(data=index)  for the standard data sets.

## The function is currently defined as
function (ip, x) 
	{
	    i = iif(ip, x)
	    if (is.null(dim(i$f))) 
	        dim(i$f) = c(length(i$x), length(i$f))
	    f = apply(i$f, 1, sum)
	    r = list(x = i$x, f = f, ni = ncol(i$f))
	    return(r)
	}