Saving Numpy Structure Array to *.mat file

Question

I am using numpy.loadtext to generate a structured Numpy array from a CSV data file that I would like to save to a MAT file for colleagues who are more familiar

Answer 1

You can do scipy.io.savemat('test.mat', {'mydata': mydata}).

This creates a struct mydata with fields foo and bar in the file.

Alternatively, you can pack your loop in a dict comprehension:

tmp = {varname: mydata[varname] for varname in mydata.dtype.names}

I don't think creating a temprorary dictionary duplicates data in memory, because Python generally only stores references, and numpy in particular tries to create views into the original data whenever possible.