sum {Brobdingnag}

Various summary statistics for brobs and glubs

Description

Various summary statistics for brobs and glubs

Arguments

x, ...

Objects of class brob or, in the case of sum() and prob(), class glub

na.rm

Boolean, with default FALSE meaning to interpret NAs literally and TRUE meaning to ignore any such elements

Details

For a brob object, being NA is not entirely straightforward. The S4 method for is.na is too “strict” for some of the functions considered here. Consider max(a) where a includes only positive, fully specified, elements, and elements with known negative sign and exponents that include NA values. Here, max(a) is unambiguously determined.

Similar logic applies to min() and, by extension, range().

Note

Function prod() is very slow for long glub vectors. It has to compute four Brobdingnagian products and two Brobdingnagian sums per element of its argument, and this takes a long time.

Author(s)

Robin K. S. Hankin

See Also

is.na

Examples

a <- as.brob(1:10)
max(cbrob(1:10,brob(NA,FALSE)))