extract-methods: [[

In neuroim2: Data Structures for Brain Imaging Data

[[

Description

This function extracts a single volume from a NeuroVec object.

Extracts a subset of data from a sparse four-dimensional brain image based on provided indices.

Usage

## S4 method for signature 'DenseNeuroVol,numeric,missing,ANY'
x[i, j, k, ..., drop = TRUE]

## S4 method for signature 'DenseNeuroVol,integer,missing,ANY'
x[i, j, k, ..., drop = TRUE]

## S4 method for signature 'NeuroVec,numeric'
x[[i]]

## S4 method for signature 'NeuroVec,character'
x[[i]]

## S4 method for signature 'NeuroVol,ROICoords,missing,ANY'
x[i, j, ..., drop = TRUE]

## S4 method for signature 'NeuroVol,ROIVol,missing,ANY'
x[i, j, k, ..., drop = TRUE]

## S4 method for signature 'DenseNeuroVol,ROIVol,missing,ANY'
x[i, j, k, ..., drop = TRUE]

## S4 method for signature 'SparseNeuroVol,numeric,numeric,ANY'
x[i, j, k, ..., drop = TRUE]

## S4 method for signature 'ROIVol,numeric,missing,ANY'
x[i, j, ..., drop = TRUE]

## S4 method for signature 'ROIVol,logical,missing,ANY'
x[i, j, k, ..., drop = TRUE]

## S4 method for signature 'ROIVol,ROICoords,missing,ANY'
x[i, j, k, ..., drop = TRUE]

## S4 method for signature 'ROIVol,matrix,missing,ANY'
x[i, j, k, ..., drop = TRUE]

## S4 method for signature 'ROIVol,missing,missing,ANY'
x[i, j, k, ..., drop = TRUE]

## S4 method for signature 'ROIVol,missing,numeric,ANY'
x[i, j, k, ..., drop = TRUE]

## S4 method for signature 'ROIVol,numeric,numeric,ANY'
x[i, j, k, ..., drop = TRUE]

## S4 method for signature 'ROIVol,logical,numeric,ANY'
x[i, j, k, ..., drop = TRUE]

## S4 method for signature 'ROIVol,ROICoords,numeric,ANY'
x[i, j, k, ..., drop = TRUE]

## S4 method for signature 'ROIVol,matrix,numeric,ANY'
x[i, j, k, ..., drop = TRUE]

## S4 method for signature 'ROICoords,numeric,missing,ANY'
x[i, j, ..., drop = TRUE]

## S4 method for signature 'ROIVol,numeric,missing,ANY'
x[i, j, ..., drop = TRUE]

## S4 method for signature 'NeuroVol,ROICoords,missing,ANY'
x[i, j, ..., drop = TRUE]

## S4 method for signature 'AbstractSparseNeuroVec,numeric,numeric,ANY'
x[i, j, k, m, ..., drop = TRUE]

Arguments

x	An object of class AbstractSparseNeuroVec
i	Numeric vector specifying the indices for the first dimension
j	Numeric vector specifying the indices for the second dimension
k	Numeric vector specifying the indices for the third dimension (optional)
...	Additional arguments passed to methods
drop	Logical indicating whether to drop dimensions of length one (default: TRUE)
m	Numeric vector specifying the indices for the fourth dimension (optional)

Value

a DenseNeuroVol object

A subset of the input object, with dimensions depending on the indexing and the 'drop' parameter.

An array containing the extracted subset

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