How do i use divideblock to split my Datasets (5,749 images) in 80-20 split to obtain training and test datasets only?

How do i use divideblock to split my Datasets (5,749 images) in 80-20 split to obtain training and test datasets only. Upon running my code below, number of images in trainingA = (1*4001) and testA = (1*999 double) which is less than 5,749

Code: [trainA, testA] = divideblock(5749, 0.8, 0.2);

I will appreciate suggestions of other options.

Answer 1

[KSSV]

N = 5749;  % number of images 
idx = 1:N ;
PD = 0.80 ;
train_idx = idx(1:round(PD*N) ;     % training indices 
test_idx = idx(round(PD*N):end,:) ; % test indices

[Chidiebere Ike]

Thanks for your response. Based on your reply, am I expected to input Ptest = 0.20; (on 20% ratio of test images) to indicate test % as I stated below? Please guide me.

N = 5749; % number of images idx = 1:N ; Ptrain = 0.80 ; Ptest = 0.20 ; train_idx = idx(1:round(Ptrain*N);% training indices test_idx = idx(1:round(Ptest*N)) ; % test indices