Split array into some equal and some unequal length sections

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Phil Roberts
Phil Roberts 2018-11-27
回答： Bruno Luong 2018-11-27
Hello,
I have an array which is 41683 rows long. I wish to split this into as many new arrays of 60 rows as possible.
However, 41683 does not divide by 60 into whole numbers (694.717); hence I need to write some code that will result in 694 columns x 60 rows and a final columns for the remaining 43 rows (0.717 x 60).
I have tried using:
a = [1:41683]'
b = reshape(a,60,[]) but because 41863 is not completely divisible by 60, I get an error.
Can anyone help please?
Many thanks,
Phil

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采纳的回答

Andrei Bobrov
Andrei Bobrov 2018-11-27
编辑：Andrei Bobrov 2018-11-27
n = 60;
ii = (1:numel(a))';
out = accumarray([rem(ii-1,n)+1,ceil(ii/n)],a,[],[],nan);
or
out = reshape([a;nan(mod(-numel(a),n),1)],n,[]);

更多回答（2 个）

madhan ravi
madhan ravi 2018-11-27
Convert the array to cell and then use reshape()
Bruno Luong
Bruno Luong 2018-11-27
a = [1:41683]'
n = size(a,1);
blk = 60;
lgt = ones(1,floor(n/blk))*blk;
r = n-sum(lgt);
if (r > 0) lgt(end+1) = r;
b = mat2cell(a,lgt,1)

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