load matrix from .mat files into neural designer

Hi!

I'm using Neural Designer to build my NN. My input data are 2d matrix. I saved them into .mat files from numpy.

I found how to read them from command line:

train_struct = load('train.mat')

And then, to get the matrix :

X_train = train_struct.train

Now I want to use these data in the Neural Designer. I splitted data so that each class is in a separate subfolder, however when I do 'Import data' then select folder I get the following error : "Invalid image folder". I think this is because I have .mat files and not images. Is there a way to use Neural Designer with such data?

Thank you!