How to read .npy files in Matlab

This did the job for me, I used it to read npy files.

https://github.com/kwikteam/npy-matlab

If you only want to read .npy file all you need from the npy-matlab project are two files: readNPY.m and readNPYheader.m.

Usage is as simple as:

>> im = readNPY('/path/to/file.npy');

There is a c++ library available https://github.com/rogersce/cnpy

You could write a mex function to read the data. I would prefer to store everything in hdf5