disc.mexp: Expected Values of Discrete Random Variables

In tjssu/Rstat: Basic Statistical Methods in R

Description

Expected Values of Discrete Random Variables

Usage

disc.mexp(xv, fx, fx2, fx3, mt, dig = 3, del = 0.2, prt = TRUE,
  plot = TRUE)

Arguments

xv	Vector of random variable values
fx	List of probability distributions (2~9)
fx2	Second list of probability distributions (same number of fx)
fx3	Third list of probability distributions (same number of fx)
mt	Vector of plot titles
dig	Number of digits below decimal point, Default: 3
del	Distance between the probability distribution plots, Default: 0.2
prt	Print the expected values and variances? Default: TRUE
plot	Plot the probability distributions? Default: TRUE

Value

list(Ex, Vx, Dx)

Examples

# Binomial distributions
n = 10;  p=c(0.2, 0.5, 0.8); x = 0:n
fx1 = fx2 = list()
for (i in 1:3) fx1[[i]] = dbinom(x, n, p[i])
mt1 = paste0("B(10,", p, ")")
disc.mexp(x, fx1, mt=mt1)
# Binomial vs. Hypergeometric
N = 50;  S =c(10, 25, 40); n = 10; x = 0:n
for (i in 1:3) fx2[[i]] = dhyper(x, S[i], N-S[i], n)
mt12 = paste0("HG(10,50,", S,"):B(10,", p,")")
disc.mexp(x, fx2, fx1, mt=mt12)

tjssu/Rstat documentation built on Aug. 8, 2020, 12:38 p.m.