pre allocating vector for loop

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Oday Shahadh
Oday Shahadh 2020-6-12
评论： Oday Shahadh 2020-6-12
Can any one tell how to pre allocate c1?
thanks
for ii = 1:length(a11);
c1=cross(L1(1,:),a11(ii,:));
end

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madhan ravi
madhan ravi 2020-6-12
c1 = cell(numel(a11),1); % before loop use numel instead of length
c1{ii} = ... inside loop
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Oday Shahadh
Oday Shahadh 2020-6-12
Then Madhani how can I switch all these cell arrays to ( n,3) matrix

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