as.mask: Convert to a LogicalNeuroVol

In bbuchsbaum/neuroim2: Data Structures for Brain Imaging Data

Convert to a LogicalNeuroVol

Description

Convert to a LogicalNeuroVol

Usage

as.mask(x, indices)

Arguments

x	the object to binarize
indices	the indices to set to TRUE

Value

A LogicalNeuroVol object with TRUE values at the specified indices.

Examples

# Create a simple 3D volume with random values
space <- NeuroSpace(c(10,10,10), spacing=c(1,1,1))
vol <- NeuroVol(array(runif(1000), c(10,10,10)), space)

# Create a mask by thresholding (values > 0.5 become TRUE)
mask1 <- as.mask(vol > 0.5)

# Create a mask by specifying indices
indices <- which(vol > 0.8)  # get indices of high values
mask2 <- as.mask(vol, indices)

# Both masks are LogicalNeuroVol objects
identical(class(mask1), class(mask2))

bbuchsbaum/neuroim2 documentation built on Feb. 26, 2025, 3:49 p.m.