how to extend a cell array?
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i have a 1D cell array . i wish to increase its size by adding zeros to its right . i think i can use pad array with LOC as 'b' but i dont know the synax. help me with this please.
采纳的回答
Image Analyst
2015-4-27
Try this:
ca{1} = 'abc' % Put string in first cell.
% Now pad with cells that have a numerical zero in them.
for k = 2 : 15
ca{k} = 0;
end
4 个评论
Nabhdeep Bansal
2015-4-30
Stephen23
2015-4-30
No preallocation and a slow loop, this is a poor solution as the cell array gets expanded and MATLAB has to keep reallocating memory... see my answer for a faster and neater solution.
Image Analyst
2015-4-30
Yes, your way is faster and more "MATLAB-ish" which is why I voted for it. Though for only 15 cells you won't notice. My method took only 40 microseconds:
Elapsed time is 0.000040 seconds.
With a million elements to set it gets almost up to a second while your method stays short (around 15 microseconds).
Of course for small arrays it will not make much difference... but surely it is just as easy to learn good habits rather than to have to unlearn bad ones?
After all today's undergrad is tomorrows PhD candidate, and then it really will make a difference to their muon-path dataset analysis.
Thank you for the vote!
更多回答（2 个）
>> ca{1} = 'abc'
>> ca(2:15) = {0}; % put whatever value you want in this scalar cell
Just one line of code and no loops are required to extend a cell array. Note that that curly brackets and parentheses are deliberate!
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