Index Exceeds Matrix Dimension Error for the following code

    % trial = 2;
total_trial = 50;

 F_train_size = zeros(1,NumAct);
F_test_size  = zeros(1,NumAct);
HOGs_train_all= zeros(size(DMM_HOG_front,1),size(DMM_HOG_front,2));
HOGs_test_all= zeros(size(DMM_HOG_front,1),size(DMM_HOG_front,2));
train_class = zeros(1,size(DMM_HOG_front,1));
test_class = zeros(1,size(DMM_HOG_front,1));

    count = 0;
    for i = 1:NumAct 
        ID = subject_ind{i};
        F = TotalFeature(:,count+1:count+OneActionSample(i));
        HOG_train_front =DMM_HOG_front(count+1:count+OneActionSample(i), :);
        HOG_train_side = DMM_HOG_side(count+1:count+OneActionSample(i), :);
        HOG_train_top = DMM_HOG_top(count+1:count+OneActionSample(i), :);

        index = ind(trial,i);
        train_index = index(1:ceil(length(index)*ratio));
        for k = 1:length(train_index)
            ID(ID==train_index(k)) = 0;
        end
  end

|Index exceeds matrix dimensions.

Error in DMM_HOG (line 90) index = ind(trial,i);|

[Walter Roberson]

Please include the entire error message, everything in red.

Answer 1

[Walter Roberson]

You define ind somewhere before this code. Whatever you defined it as does not have at least 2 elements in its first dimension, or else is empty in its second dimension.