Array formation and parentheses-style indexing with objects of class 'matlab.io.datastore.CombinedDatastore' is not allowed. Use objects of class 'matlab.io.datastore.CombinedDatastore' only as scalars or use a cell array.

[Devika21-hub]

clc

close all

%%%%% Change path to your system path %%%%%%%%%%%%%%%%%%%%%%%%55
rootFolder = fullfile('/MATLAB Drive/caltech-101');

imageDatastore = [ imageDatastore(fullfile(rootFolder, 'lotus')), ...
imageDatastore(fullfile(rootFolder, 'panda')), ...
imageDatastore(fullfile(rootFolder, 'laptop') ) ];

{ imageDatastore.Description } % display all labels on one line

[imageDatastore.Count] % show the corresponding count of images

minimageDatastoreCount = min([imageDatastore.Count]); % determine the smallest amount of images in a category

% Use partition method to trim the set.
imageDatastore = partition(imageDatastore, minimageDatastoreCount, 'randomize');

% Notice that each set now has exactly the same number of images.
[imageDatastore.Count]

[trainingimageDatastore, validationimageDatastore] = partition(imageDatastore, 0.3, 'randomize');

lotus = read(trainingimageDatastore(1),1);
panda = read(trainingimageDatastore(2),1);
laptop = read(trainingimageDatastore(3),1);
figure

subplot(1,3,1);
imshow(lotus)
subplot(1,3,2);
imshow(panda)
subplot(1,3,3);
imshow(laptop)

What changes need to be done to the code mentioned to overcome the error mentioned in title??

[robertogl]

Hi, are you working on any of the challenge projects? I think MATLAB Answer is the best place to post this sort of questions. Beside, there is already an answer to this question here