nrrd.type.info: Convert the NRRD type name of a volume into R data type...

In freesurferformats: Read and Write 'FreeSurfer' Neuroimaging File Formats

Convert the NRRD type name of a volume into R data type information.

Description

The NRRD spec names the data type of the values with a set of aliases for the standard integer and floating point types ('uint8', 'unsigned char', 'uchar', ...), see https://teem.sourceforge.net/nrrd/format.html. The 64 bit integer types have no R equivalent and are read as doubles, which is exact up to 2^53.

Usage

nrrd.type.info(type_name, filepath = "")

Arguments

type_name	character string, the value of the 'type' header field.
filepath	character string, the file the header was read from, used in error messages.

Value

named list with entries what (the readBin type), size (bytes per value), signed (logical, for integer types), itemsize (bytes per value), r_class ('integer' or 'double'), is_int64 (logical) and wide (logical, whether the type has to be interpreted from its raw bytes instead of being read by readBin).

freesurferformats documentation built on Sept. 25, 2026, 1:07 a.m.