Check Numeric Values
assert_count(x)assert_numeric(x, expected, ...)
assert_trend(x, expected, ...)
assert_relation(x, y, expected, ...)
Throws an error, if any, and returns x invisibly otherwise.
N. Frerebeau
Possible values for expected:
assert_numeric()"positive", "whole", "odd" or "even"
assert_trend()"constant", "decreasing" or "increasing"
assert_relation()"lower" or "greater"
Other validation methods:
check-attribute,
check-data,
check-graph,
check-matrix,
check-type,
validate()