matrixtrim: Trim Matrix

In JVAdams/jvamisc: A Collection of Utility Functions

Description

Trim the rows and columns of a logical matrix until every row and columns has a specified level of TRUE values.

Usage

matrixtrim(m, prop = c(1, 1), rowsfirst = TRUE)

Arguments

m	A logical matrix to be trimmed, should be all TRUE, FALSE (or 0, 1).
prop	A numeric vector of length two, the minimum proportion of TRUE values in each row and column of the trimmed matrix, default c(1, 1).
rowsfirst	A logical scalar, indicating if rows (TRUE, the default) or columns (FALSE) should be trimmed from the matrix first.

Value

A list of length three:

• trim=a logical matrix, the resulting trimmed matrix

• dim=a numeric vector of length 2, the dimensions of trim

• n=a numeric scalar, the total number of TRUE values in trim

Examples

m <- matrix(rep(c(1, 0, 1, 0), c(4, 1, 13, 2)), nrow=5)
matrixtrim(m)
matrixtrim(m, rowsfirst=FALSE)
matrixtrim(m, prop=c(0.7, 0.7))

JVAdams/jvamisc documentation built on Aug. 11, 2021, 6:43 a.m.