as_cpt: As cpt

In sparta: Sparse Tables

As cpt

Description

Turn a sparta into a conditional probability table

Usage

as_cpt(x, y)

## S3 method for class 'sparta'
as_cpt(x, y)

Arguments

x	sparta object
y	the conditioning variables

Examples

x <- array(
  c(1,0,0,2,3,4,0,0),
  dim = c(2,2,2),
  dimnames = list(
    a = c("a1", "a2"),
    b = c("b1", "b2"),
    c = c("c1", "c2")
  )
)

sx <- as_sparta(x)

# A joint probability table p(a, b, c)
as_cpt(sx, character(0))
# the same as normalize
normalize(sx)

# A conditional probability table p(a, c | b)
pacb <- as_cpt(sx, "b")

# The probability distribution when b = b1
slice(pacb, c(b = "b1"))

sparta documentation built on April 12, 2022, 9:06 a.m.