RNifti: internalImage – R documentation

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internalImage

Internal images

Description

An internal image is a simple R object with a few attributes including a pointer to an internal C structure, which contains the full image data. They are used in the package for efficiency, but can be converted to a normal R array using the as.array method. Attributes of these objects should not be changed.

Usage

## S3 method for class 'internalImage'
dim(x)

## S3 replacement method for class 'internalImage'
dim(x) <- value

## S3 method for class 'internalImage'
as.array(x, ...)

## S3 method for class 'internalImage'
x[i, j, ..., drop = TRUE]

## S3 replacement method for class 'internalImage'
x[i, j, ...] <- value

Arguments

`x`	An `"internalImage"` object.
`value`	Not used. Changing the dimensions of (or data in) an internal image is invalid, and will produce an error. Convert to an array first.
`...`	Additional parameters to methods. Only used for additional indices.
`i, j`	Index vectors. May be missing, which indicates that the whole of the relevant dimension should be obtained.
`drop`	If `TRUE` (the default), unitary indices in the result will be dropped. This mirrors the behaviour of standard array indexing.

Author(s)

Jon Clayden <code@clayden.org>

RNifti

Fast R and C++ Access to NIfTI Images

v1.3.0

GPL-2

Authors

Jon Clayden [cre, aut] (<https://orcid.org/0000-0002-6608-0619>), Bob Cox [aut], Mark Jenkinson [aut], Matt Hall [ctb], Rick Reynolds [ctb], Kate Fissell [ctb], Jean-loup Gailly [cph], Mark Adler [cph]

Initial release

2020-12-04