# sir i tried one code for framing and windowing but the code showing error like this Error in lpcoefficient (line 21) wind(i,:)=​fr_ws(i,:)​.*r(i,:); how i rectify the error

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Suchithra K S on 9 May 2019
Commented: Suchithra K S on 14 May 2019
the code is given below,
s = x(1:93098,:);
N=length(s);
frameduration=0.00475;
framelength=frameduration*fs;
num_frames=floor(N/framelength);
count=0;
for k= 1: num_frames
frames(k,:)=s((k-1)*framelength +1 : framelength*k);
count=count +1;
end
m_amp = abs(max(frames,[],2)); % find maximum of each frame
id = find(m_amp > 0.06); % finding ID of frames with max amp > 0.03
fr_ws = frames(id,:); % frames without silence
for i=1:num_frames
v=length(fr_ws);
r=hamming(v);
wind(i,:)=fr_ws(i,:).*r(i,:);
end
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Suchithra K S on 9 May 2019
the error is like this "Index exceeds matrix dimensions.
Error in lpcoefficient (line 21)
wind(i,:)=fr_ws(i,:).*r(i,:);

Jan on 9 May 2019
Edited: Jan on 9 May 2019
One hint: In
for i=1:num_frames
v=length(fr_ws);
r=hamming(v);
wind(i,:)=fr_ws(i,:).*r(i,:);
end
v and r are constant. Then move the definition out of the loop to avoid a repeated computation. Maybe wind has the wrong size, because it is not pre-allocated - postinmg the error message would reveal this detail, so share this important message with the readers. Then:
v = length(fr_ws);
r = hamming(v);
wind = zeros(num_frames, v);
for i = 1:num_frames
wind(i,:) = fr_ws(i,:) .* r(i,:);
end
Now r(i, :) is a scalar. Is this wanted, or do you mean:
for i = 1:num_frames
wind(i,:) = fr_ws(i,:) .* r.';
end
I guess, you can omit the loop completely using the modern auto-expanding:
wind = fr_ws .* r.';
Suchithra K S on 14 May 2019
I tried the above to my code at that time also it showing error
Error using bsxfun
Non-singleton dimensions of the two input arrays must match each other.
Error in lpcoefficient (line 24)
wind = bsxfun(@times, fr_ws, r.');
How to rectify this error?