use of train and test data

hello,

I've used this code to separate data to test and train .for example i have a dataset include of 6 image. when i run this code, training data is correct and have 3 image but testing data is like this image :(The third image is repeated again).

I can't understand what is the problem .

Please help me

thank you

idx = 1:numImageFiles ;
  PTrain = 0.50 ;
  Ptest = 0.50;
  train_idx = baseFileNames(1:round(PTrain*numImageFiles));     % training indices 
  test_idx = baseFileNames(round(Ptest*numImageFiles):end,:) ; %test

Answer 1

[Walter Roberson]

You use round(PTrain*numImageFiles) as the upper limit for train_idx, and you use the same round(PTrain*numImageFiles) as the lower limit for test_idx . That is going to include round(PTrain*numImageFiles) exactly in both train_idx and test_idx .

[Elahe Karimi]

I deleted the (round) but it's still the same. Maybe please give me more advice.

thank you so much

[Walter Roberson]

The round is not the problem. Consider you are doing the equivalent of

x(1:3)   %index 1, 2, 3
x(3:6)   %index 3, 4, 5, 6

When your first range ends at N, then your second range needs to start from at least one greater than N or else you will have overlap.

[Elahe Karimi]

ok,I understood. Thank you very much for response.

round(Ptest*numImageFiles)+1