How to spearate the output of vl_hog() into 6*6*31 blocks, and use reshape() to convert every block to a row vector?

How to spearate the output of vl_hog() into 6*6*31 blocks,

and use reshape() to convert every block to a row vector,

then save each vector to features_neg, and increase idx by 1

idx=0;

for i=1:num_images

    im=imread([non_face_scn_path '/' image_files(i).name]);

    %%%%% JZ: please follow the steps below to compute HOG features for each image.

    %%%%% 1. use single() function to convert input image to SINGLE class;

    %%%%% 2. call vl_hog() function, two parameters: one is the image, the

    %%%%% other is the feature_parames.hog_cell_size;

    %%%%% JZ: Your code here!

        im=single(im);

    hog = vl_hog(im, feature_params.hog_cell_size, 'verbose');

 

    

    for m=1:step:size(im,1)

        for n=1:step:size(im,2)

            %%%%% JZ: spearate the output of vl_hog() into 6*6*31 blocks,

            %%%%% use reshape() to convert every block to a row vector,

            %%%%% save each vector to features_neg, and increase idx by 1

            %%%%% JZ: Your code here!

            idx=idx+1

            feature_neg(idx,:)=reshape(hog,1,[]);

%feature_neg(idx,:) = reshape(hog(m:m+step-1, n:n+step-1, :), [], 1);

            idx=idx+1            

 

        end

    end

    disp(['idex is: ' num2str(idx)]);

    disp(['case is: ' num2str(i)]);   

end

idx

[Walter Roberson]

What is the difference between this and our existing discussions?

[Pooyan Mobtahej]

Here is the error that I want your help to resolve:

Unable to perform assignment because the size of the left side is 1-by-775 and the size of the right side

is 0-by-1.

Error in get_random_negative_features (line 66)

feature_neg(idx,:) = reshape(hog(m:step-1, n:step-1, :),[],1);

Error in project (line 71)

features_neg = get_random_negative_features( non_face_scn_path, feature_params, num_negative_examples);

[Walter Roberson]

Reread what I posted before!!!

            feature_neg(idx,:) = reshape(hog(m:m+step-1, n:n+step-1, :), [], 1);
                                               ^^          ^^