shade.norm {asbio} | R Documentation |
Creates plots with lower, upper, two-tailed, and middle of the distribution shading for popular pdfs.
shade.norm(x = NULL, from = NULL, to = NULL, sigma = 1, mu = 0, tail = "lower", show.p = TRUE, show.dist = TRUE) shade.t(x = NULL, from = NULL, to = NULL, nu = 3, tail = "lower", show.p = TRUE, show.dist = TRUE) shade.F(x = NULL, from = NULL, to = NULL, nu1 = 1, nu2 = 5, tail = "lower", show.p = TRUE, show.dist = TRUE, prob.to.each.tail = 0.025) shade.chi(x = NULL, from = NULL, to = NULL, nu = 1, tail = "lower", show.p = TRUE, show.dist = TRUE, prob.to.each.tail = 0.025)
x |
A quantile, i.e. a single number X = x. |
from |
To be used with tail = "middle" ; the value a in P(a < X < b).
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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 "from" and "to" .
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show.p |
Logical; indicating whether probabilities 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" .
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Returns a plot with the requested pdf and probability shading.
Lower-tailed chi-squared probabilities are currently not plotted correctly for df < 3.
Ken Aho
##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")