View source: R/betafunctions.R
Beta.gfx.poly.cdf | R Documentation |
Plotting tool, producing a two-column matrix with values of y
corresponding to locations on x
. Useful for shading areas under the curve when tracing the line for the Beta cumulative probability functions.
Beta.gfx.poly.cdf(from, to, by, alpha, beta, l = 0, u = 1)
from |
The point of the |
to |
The point of the |
by |
The resolution (or spacing) at which to produce |
alpha |
The alpha shape-parameter value for the Standard Beta cumulative probability distribution. |
beta |
The beta shape-parameter for the Standard Beta cumulative probability distribution. |
l |
The lower-bound location parameter of the Beta distribution. |
u |
The upper-bound location parameter of the Beta distribution. |
A two-column matrix with cumulative probability-values of y to plot against corresponding location values of x
.
# To box in an area under a four-parameter Beta cumulative distribution with
# location parameters l = 0.25 and u = 0.75, and shape parameters
# alpha = 5 and beta = 3, from 0.4 to 0.6:
plot(NULL, xlim = c(0, 1), ylim = c(0, 1))
coords <- Beta.gfx.poly.cdf(from = 0.4, to = 0.6, by = 0.001, alpha = 5,
beta = 3, l = 0.25, u = 0.75)
polygon(coords)
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