I'm trying to convert a .pkl 4D array into a datastore on MATLAB

I'm trying to convert a .pkl 4D array into a datastore on MATLAB, so that I can use the datastore to train a convolutional neural network. I have tried converting the .pkl file to a .mat, a .png and a .txt through python, but none have worked. When I try to convert the .mat file to the datastore using the code:

ds = datastore('folderpath', 'FileExtensions', '.mat', 'Type', 'tabularText')

I get the error "Cannot intepret data in the file 'filepath'. Found 3 variable names but 2 data columns. You may need to specifiy a different format, delimiter or number of lines.'

Answer 1

[Shreshth]

Hi Hugh,

The tabularText type is intended for reading tabular data from text files, which doesn't match the structure of .mat files containing 4D arrays. For .mat files, you should consider using a fileDatastore. Here is an example to show how you can achieve this:

fds = fileDatastore('filename',"ReadFcn",@load,"FileExtensions",".mat");
data1 = read(fds);

For more information on fileDatastore function, refer to the following MathWorks documentation:

https://www.mathworks.com/help/matlab/ref/matlab.io.datastore.filedatastore.html