analyze.dtype.info: Compute the R data type and the number of bytes per value for...

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

Compute the R data type and the number of bytes per value for an ANALYZE data type.

Description

Compute the R data type and the number of bytes per value for an ANALYZE data type.

Usage

analyze.dtype.info(analyzeheader, filepath = NULL)

Arguments

analyzeheader	named list, an ANALYZE 7.5 header as returned by read.analyze.header.
filepath	character string, the path of the file the header was read from. Only used for warning and error messages.

Value

named list with the entries datatype and bitpix (the data type fields to use for reading the data, which may differ from the values in the file if the file contradicts itself), num_bytes (the number of bytes per value) and r_dtype (the R type to read the values as).

Note

ANALYZE files in the wild sometimes have a wrong bitpix field, since the format was used by many tools that did not care about it. The data type is the reliable field, so if the two fields contradict each other, the bitpix value that belongs to the data type is used, with a warning.

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