Augmented image data store wont work unless i write Augmented image Source, is this stopping me from making a data store?

Compile errors says:

Error using trainingOptions (line 187)
The value of 'ValidationData' is invalid. Validation data must be a table, an ImageDatastore, or a cell
array with input data and responses.

[Walter Roberson]

Which MATLAB release are you using?

[Nathan Reilly]

R2017b

Answer 1

[Walter Roberson]

augmented image data store was not introduced until R2018a.

[Nathan Reilly]

I know so everyone says use AugmentedImageSource but when i try to train with my data it says it must be from a data store which my matlab doesnt have. So i have tried using imresize for example: inputSize = [227 227 3]; imds.ReadFcn = @(loc)imresize(imread(loc),[inputSize]); Plus many combinations of this code and more. Still wont work compile error says all images must be the same size. Or it says target images are 227 227 1 but need to be 227 227 3 for alexnet, so i need to use 4Darray but cant get that to work either...

[Walter Roberson]

The input images must be RGB for alexnet. You can construct RGB images from grayscale images as

imds.ReadFcn = @(loc) repmat(imresize(imread(loc),[inputSize]),[1 1 3]);

Answer 2

[Helen Victoria]

Error using trainingOptions (line 262)

The value of 'ValidationData' is invalid. MiniBatchable Datastore has no responses.

Error in cifarpretrained (line 24)

options = trainingOptions('sgdm', . Am getting this error while training on alexnet using transfer.I am using 2018b version