selectSome: Extract elements of a vector for concise rendering

In Biobase: Biobase: Base functions for Bioconductor

Description

Extract the first and last several elements of a vector for concise rendering; insert ellipses to indicate elided elements. This function is primarily meant for developer rather than end-user use.

Usage

selectSome(obj, maxToShow=5)

Arguments

obj	A vector.
maxToShow	The number of elements (including "...") to render.

Details

This function can be used in 'show' methods to give users exemplars of the tokens used in a vector. For example, an ExpressionSet built from a yeast experiment might have features enumerated using systematic gene names (e.g., YPR181C) or standard gene names (e.g., SEC23). The show method for ExpressionSet uses selectSome to alert the user to the tokens used, and thereby to indicate what vocabulary must be understood to work with the feature names.

Value

A string vector with at most maxToShow plus 1 elements, where an ellipsis ("...") is included to indicate incompleteness of the excerpt.

Author(s)

Martin Morgan <[e-mail]>

Examples

selectSome(1:20)

Biobase documentation built on Nov. 8, 2020, 6:52 p.m.