as.dense-methods: Convert a NeuroVecSeq to a DenseNeuroVec

In neuroim2: Data Structures for Brain Imaging Data

Convert a NeuroVecSeq to a DenseNeuroVec

Description

Materializes a NeuroVecSeq as a single DenseNeuroVec with the sequence's combined space.

Convert a sparse volumetric image to a dense representation with the same spatial geometry. Non-zero values stored in the sparse vector are placed at their corresponding linear indices in the dense array; all other voxels are 0.

Identity method: returns a DenseNeuroVol (or subclass such as LogicalNeuroVol) unchanged.

This function provides a method to coerce an object of class ROIVol to a DenseNeuroVol using the as.dense method.

Usage

## S4 method for signature 'ClusteredNeuroVol'
as.dense(x)

## S4 method for signature 'NeuroVecSeq'
as.dense(x)

## S4 method for signature 'SparseNeuroVol'
as.dense(x)

## S4 method for signature 'DenseNeuroVol'
as.dense(x)

## S4 method for signature 'ROIVol'
as.dense(x)

## S4 method for signature 'SparseNeuroVec'
as.dense(x)

Arguments

x	An object of class ROIVol to be coerced to a DenseNeuroVol.

Value

A NeuroVol object representing the dense version of the clustered volume.

A DenseNeuroVec containing all sequence volumes concatenated in time.

A DenseNeuroVol with identical spatial dimensions and values expanded from the sparse representation.

A DenseNeuroVol object obtained by coercing the ROIVol object.

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