matlab code into pseudocode

Can somebody translate this following code into pseudocode (explanation in normal words what is done) as I am not familiar with matlab and I want to implement it in java.


for ii = 1:interval:len
SECTIONS(:,kk) = dividefreqs(Y(ii:ii+window-1).*hanw,FS).';
    kk = kk+1;
end

here especially I dont thet part Y(ii:ii+window-1).*hanw
is Y(ii:ii+window-1) iterating thorugh the array? and I read that if you multiply two arrays they have to have the same size but here "hanw" has size 16317 and window=512

and also this bit of code:

for ii = ssize(1):-1:2
    FREQDIFF(ii-1,:) = SECTIONS(ii-1,:)-SECTIONS(ii,:);
end

for jj = 2:ssize(2)
    SECDIFF(:,jj-1) = FREQDIFF(:,jj) - FREQDIFF(:,jj-1);
end

for ii = 1:ssize(1)-1
    for jj = 1:ssize(2)-1
        if SECDIFF(ii,jj) > 0
            SECBIGGER(ii,jj) = 1;
        end
    end
end