asbio (version 0.3-3)

shade.norm: Shading functions for interpretation of pdf probabilities.

Description

Creates plots with lower, upper, two-tailed, and middle of the distribution shading for popular pdfs.

Usage

shade.norm(x = NULL, from = NULL, to = NULL, sigma = 1, mu = 0,
tail = "lower", show.p = TRUE, show.d = FALSE, show.dist = TRUE, digits = 5, 
shade.col="gray",...)

shade.t(x = NULL, from = NULL, to = NULL, nu = 3, tail = "lower", 
show.p = TRUE, show.d = FALSE, show.dist = TRUE, digits = 5, 
shade.col="gray",...)

shade.F(x = NULL, from = NULL, to = NULL, nu1 = 1, nu2 = 5, 
tail = "lower", show.p = TRUE, show.d = FALSE, show.dist = TRUE, 
prob.to.each.tail = 0.025, digits = 5, shade.col="gray",...)

shade.chi(x = NULL, from = NULL, to = NULL, nu = 1, tail = "lower", 
show.p = TRUE, show.d = FALSE, show.dist = TRUE, prob.to.each.tail = 0.025, 
digits = 5,shade.col="gray",...)

shade.bin(x=NULL,from=NULL,to=NULL,n=1,p=0.5,tail="X=x",show.p=TRUE,
show.dist=TRUE, show.d=FALSE,digits=5, ...)

shade.poi(x=NULL,from=NULL,to=NULL,lambda=5,tail="X=x",show.p=TRUE,
show.dist=TRUE, show.d=FALSE,digits=5, ...)

Arguments

x

A quantile, i.e. $X = x$.

from

To be used with tail = "middle"; the value a in $P(a < X < b)$.

to

To be used with tail = "middle"; the value b in $P(a < X < b)$.

sigma

Standard deviation for the nomral distribution.

mu

Mean of the normal distribution.

tail

One of four possibilities: "lower" provides lower tail shading, "upper" provides upper tail shading, "two" provides two tail shading, and "middle" provide shading in the middle of the pdf, between

show.p

Logical; indicating whether probabilities are to be shown.

show.d

Logical; indicating whether densities are to be shown.

show.dist

Logical; indicating whether parameters for the distribution are to be shown.

nu

Degrees of freedom.

nu1

Numerator degrees of freedom for the F-distribution.

nu2

Denominator degrees of freedom for the F-distribution.

prob.to.each.tail

Probability to be apportioned to each tail in the F and Chi-square distributions if tail = "two".

digits

Number of digits to be reported in probsabilities and densities.

n

The number of trials for the binomial pdf.

p

The binomial probability of success.

lambda

The Poisson parameter (i.e. rate).

shade.col

Color of probability shading.

...

Additional arguments to plot.

Value

• Returns a plot with the requested pdf and probability shading.

Examples

##normal
shade.norm(x=1.2,sigma=1,mu=0,tail="lower")
shade.norm(x=1.2,sigma=1,mu=0,tail="upper")
shade.norm(x=1.2,sigma=1,mu=0,tail="two")
shade.norm(from=-.4,to=0,sigma=1,mu=0,tail="middle")
shade.norm(from=0,to=0,sigma=1,mu=0,tail="middle")

##t
shade.t(x=-1,nu=5,tail="lower")
shade.t(x=-1,nu=5,tail="upper")
shade.t(x=-1,nu=5,tail="two")
shade.t(from=.5,to=.7,nu=5,tail="middle")
                                                                                        
##F
shade.F(x=2,nu1=15,nu2=8,tail="lower")
shade.F(x=2,nu1=15,nu2=8,tail="upper")
shade.F(nu1=15,nu2=8,tail="two",prob.to.each.tail=0.025)
shade.F(from=.5,to=.7,nu1=15,nu2=10,tail="middle")

##Chi.sq
shade.chi(x=2,nu=5,tail="lower")
shade.chi(x=2,nu=5,tail="upper")
shade.chi(nu=7,tail="two",prob.to.each.tail=0.025)
shade.chi(from=.5,to=.7,nu=5,tail="middle")

##binomial
shade.bin(x=5,n=20,tail="X=x",show.d=TRUE)
shade.bin(x=5,n=20,tail="lower")
shade.bin(x=5,n=20,tail="two")
shade.bin(from=8,to=12,n=20,tail="middle")

##Poisson
shade.poi(x=5,lambda=6,tail="X=x",show.d=TRUE)
shade.poi(x=5,lambda=7,tail="lower")
shade.poi(x=5,lambda=8,tail="upper")
shade.poi(from=8,to=12,lambda=7,tail="middle")