nifti.dtype.info: Compute NIFTI v1 data type info from datatype and bitpix...

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

Compute NIFTI v1 data type info from datatype and bitpix header field.

Description

Compute NIFTI v1 data type info from datatype and bitpix header field.

Usage

nifti.dtype.info(datatype, bitpix)

Arguments

datatype	integer, the datatype NIFTI v1 header field
bitpix	integer, the bitpix NIFTI v1 header field

Value

named list with entries: mri_dtype: the MRI data type, as used by FreeSurfer for MGH files, r_dtype: the R data type, size: the number of bytes per value, signed: logical, whether the values are signed (only meaningful for integer types, NA for floating point types) and is_float: logical, whether the type is a floating point type.

Note

The signed entry matters for reading the data: an unsigned 8 bit value of 200 is read as -56 if it is read as a signed value, which is a silent change of the data. See read.nifti.values.

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