not-methods: Logical Negation for Neuroimaging Volumes

In neuroim2: Data Structures for Brain Imaging Data

Logical Negation for Neuroimaging Volumes

Description

Logical negation (!) for neuroimaging volumes. Returns a LogicalNeuroVol where non-zero voxels become FALSE and zero voxels become TRUE.

Usage

## S4 method for signature 'DenseNeuroVol'
!x

## S4 method for signature 'SparseNeuroVol'
!x

Arguments

x	A neuroimaging volume object.

Value

A LogicalNeuroVol.

Examples

sp <- NeuroSpace(c(5L, 5L, 5L), c(1, 1, 1))
mask <- LogicalNeuroVol(array(sample(c(TRUE, FALSE), 125, replace = TRUE),
                              c(5, 5, 5)), sp)
inv <- !mask

neuroim2 documentation built on April 16, 2026, 5:07 p.m.