scidb (version 1.2-0)

hypergeometric-methods: Hypergeometric functions in Package scidb

Description

Distribution and quantile functions for the hypergeometric distribution.

Usage

"phyper"(x, q, m, n, k, new="p",`eval`=FALSE)
"qhyper"(x, p, m, n, k, new="q",`eval`=FALSE)

Arguments

x

A scidb or scidbdf object.

q

A SciDB attribute name (character) or numeric constant representing the quantile, for example the number of white balls drawn without replacement from an urn which contains both black and white balls.

m

A scidb attribute name or numeric constant representing the number of white balls in the urn.

n

A scidb attribute name or numeric constant representing the number of black balls in the urn.

k

A scidb attribute name or numeric constant representing the number of balls drawn from the urn.

p

A scidb attribute name or numeric constant representing probability between 0 and 1.

new

A character name for the result attribute.

eval

(Optional) If true, execute the query. Otherwise defer evaluation.

Value

scidb, scidbdf reference object.

Details

The hypergeometric distribution is used for sampling without replacement. The density of this distribution with parameters m, n and k is given by

$$ p(x) = \left. {m \choose x}{n \choose k-x} \right/ {m+n \choose k}% $$

for $x = 0, \ldots, k$.

The quantile is defined as the smallest value $x$ such that $F(x) \ge p$, where $F$ is the distribution function.

phyper gives the distribution function, qhyper gives the quantile function.

Examples

## Not run: 
# # Write me
# ## End(Not run)