Your usecase doesnt seem like HDF5 would be a good fit. Yes, I do know about docx and zip. I'm happy with what matlab has done. People send me .mat files and

Your usecase doesnt seem like HDF5 would be a good fit. Yes, I do know about docx and zip. I'm happy with what matlab has done. People send me .mat files and I happily process them in python. And my plots usually look much nicer also. :)