ds.max: Maximum

In paularaissa/distStatsClient: Distributed Multiple Imputations

Description

Computes the maximum value among data nodes or for each data node.

Usage

ds.max(x = NULL, datasources = NULL)

Arguments

x	a character, the name of study variable.
datasources	a list of opal object(s) obtained after login in to opal servers; these objects hold also the data assign to R, as data frame, from opal datasources.

Details

Return the maximum of all the values present in their arguments, as integer if all are logical or integer, as double if all are numeric, and character otherwise.

The maximum of a numeric empty set is +Inf which ensures transitivity. For numeric x ds.max(x) == -Inf whenever ds.length(x) == 0 (after removing missing values if requested).

By definition the max of a numeric vector containing an NaN is NaN, except that the max of any vector containing an NA is NA even if it also contains an NaN. Note that ds.max(NA, Inf) == NA even though the maximum would be Inf whatever the missing value actually is.

Character versions are sorted lexicographically. The max of an empty character vector is defined to be character NA.

It is a wrapper for the server side function getMax.

Value

If type='split', returns a numeric list. If type='combine', return a numeric value.

Dependencies

getMax

Author(s)

Paula Raissa Costa e Silva

Examples

{
max <- ds.max('D$birth_weight')
}

paularaissa/distStatsClient documentation built on June 19, 2019, 12:43 a.m.