Check if Transform is Needed Between Spaces

Convenience function to check whether a coordinate transform is required when working with a surface template and volumetric data in a given space.

Usage

needs_transform(surface_template, volume_space)

Arguments

surface_template

Character string identifying the surface template (e.g., "fsaverage", "fsLR").

volume_space

Character string identifying the volumetric data's coordinate space (e.g., "MNI152", "MNI305").

Value

Logical. TRUE if a transform is needed, FALSE if the spaces match.

Examples

# fsaverage + MNI152 volume: transform needed
needs_transform("fsaverage", "MNI152")  # TRUE
#> [1] TRUE

# fsLR + MNI152 volume: no transform needed
needs_transform("fsLR", "MNI152")  # FALSE
#> [1] FALSE

# fsaverage + MNI305 volume: no transform needed
needs_transform("fsaverage", "MNI305")  # FALSE
#> [1] FALSE