Request: Support for structured (compound) data types

[ehennestad]

From the Zarr v2 specification

Structured data types (i.e., with multiple named fields) are encoded as a list of lists, following NumPy array protocol type descriptions (descr). Each sub-list has the form [fieldname, datatype, shape] where shape is optional. fieldname is a string, datatype is a string specifying a simple data type (see above), and shape is a list of integers specifying subarray shape. For example, the JSON list below defines a data type composed of three single-byte unsigned integer fields named “r”, “g” and “b”:

[["r", "|u1"], ["g", "|u1"], ["b", "|u1"]]

I am getting an error when trying to load a compound data type using zarrread.

Error using ZarrDatatype.fromZarrType (line 80)
Invalid argument at position 1. Value must be of type string or be convertible to string.

Error in Zarr/read (line 339)
            obj.Datatype = ZarrDatatype.fromZarrType(info.dtype);
                           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Error in zarrread (line 36)
data = zarrObj.read(options.Start, options.Count, options.Stride);
       ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

Dataset: pixel_mask.zip
MATLAB Release: R2024b

Let me know if you need more info!