How to input 2D array data for Deep learing toolbox model, not image file

I want to perform classification using 2D data as input in MATLAB using the Deep Learning Toolbox.

I have 2D-1ch and 2D-3ch data, and I want to know how to input this data into the Deep Learning Toolbox.

Currently, the data is in CSV format, but I can convert it into a suitable 2D array.

However, when I try to input the data in the imds format like the toolbox examples (imdsTrain, imdsValidation), I encounter an error when using @readDatastoreImage since it cannot read CSV files.

1. How can I read the input data in a format suitable for the toolbox? (I get an error when executing net = trainNetwork(imdsTrain, layers, options);)
2. I want to define layers directly and convert the data into a format that can be used with imageInputLayer to train the model using the trainNetwork function.
3. I would appreciate it if you could provide other alternative methods to perform classification on 2D arrays.

I would appreciate specific answers. Thank you.

Answer 1

[Matt J]

Currently, the data is in CSV format, but I can convert it into a suitable 2D array.

An imageDataStore has a ReadFcn property that you can set to enable it to read in from arbitrary file formats.

[Yongwon Jang]

First, thank you for your answer.

Yes, exactly. the @readDatastoreImage Fcn... that is dedicated to image file format.

Several years ago, I used MatConvNet and I handled 2D array at that time.

These days, mathworks provides deep learning toolbox but I cannot and I don't want edit intricsic functions. (Actually no time for editing the function in detail..)

I believe the beautifull picture is.... To use toolbox the most, and input file could be fit for that.

If possible, can you help me to make arbitrary read function?

[Matt J]

If possible, can you help me to make arbitrary read function?

You said that you already had code to read the data into a 2D array. I was trying to imply that you should use that.

[Yongwon Jang]

I changed the input format 4-d array, and tried to trainNetwork.

The solution is.. .Not using imds !!

I cound not find the way to use @readDatastoreImage Fcn.

[Matt J]

Well, if it allows you to move on with your life, I guess that's the important thing, but I don't think it's a real solution.

[Yongwon Jang]

Thank you for your comments.

However, this solution was provided by one of the matlab staff.......

I'll try that some other time. There are a lot of other issues that need to be addressed right now...