sort.InfinitySparseMatrix {optmatch}

Sort the internal structure of an InfinitySparseMatrix.

Description

Internally, an InfinitySparseMatrix (Blocked or non) comprises of vectors of values, row positions, and column positions. The ordering of these vectors is not enforced. This function sorts the internal structure, leaving the external structure unchanged (e.g. as.matrix(ism) and as.matrix(sort(ism)) will look identical despite sorting.)

Usage

## S3 method for class 'InfinitySparseMatrix'
sort(x, decreasing = FALSE, ..., byCol = FALSE)

## S3 method for class 'BlockedInfinitySparseMatrix'
sort(x, decreasing = FALSE, ..., byCol = FALSE)

Arguments

x

An InfinitySparseMatrix or BlockedInfinitySparseMatrix.

decreasing

Logical. Should the sort be increasing or decreasing? Default FALSE.

...

Additional arguments ignored.

byCol

Logical. Defaults to FALSE, so the returned ISM is row-dominant. TRUE returns a column-dominant ISM.

Details

By default, the InfinitySparseMatrix is row-dominant, meaning the row positions are sorted first, then column positions are sorted within each row. Use argument byCol to change this.

Value

An object of the same class as x which is sorted according to byCol.