R: Test whether an object represents an image

isImage {RNiftyReg} | R Documentation

## Test whether an object represents an image

### Description

This function tried to determine whether an object is an image that the package knows how to handle. If its class is `"nifti"`, `"niftiImage"`, `"internalImage"` or `"MriImage"`, then the result is always `TRUE`. Likewise if it has an internal image pointer. If it has no `dim` attribute, or looks like an affine matrix, then the result is `FALSE`. Otherwise the value of the `unsure` argument is returned.

### Usage

    isImage(object, unsure = NA)

### Arguments

`object` | An R object.
`unsure` | The value to return if the function can't tell whether or not the `object` is an image.

### Author(s)

Jon Clayden <code@clayden.org>

[Package RNiftyReg version 2.6.0 Index]