how to separate the non-zero elements from an array

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johnson saldanha 2018-11-28

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https://ww2.mathworks.cn/matlabcentral/answers/432469-how-to-separate-the-non-zero-elements-from-an-array

评论： johnson saldanha 2018-11-29

suppose i have a column matrix with non zero elements in between the zeros. i want to put the nonzero values in a cell of different groups of nonzero integers.

for example x=[ 0 0 0 1 2 3 0 0 2 3 5 6 0 0 2 5 0]

[1 2 3] is one group [2 3 5 6 ] is the next. i want all these groups in one cell.

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采纳的回答

KSSV 2018-11-28

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https://ww2.mathworks.cn/matlabcentral/answers/432469-how-to-separate-the-non-zero-elements-from-an-array#answer_349333

在 MATLAB Online 中打开

A = [ 0 0 0 1 2 3 0 0 2 3 5 6 0 0 2 5 0] ;
ii = zeros(size(A));
jj = A > 0;
ii(strfind([0,jj(:)'],[0 1])) = 1;
idx = cumsum(ii).*jj;
out = accumarray( idx(jj)',A(jj)',[],@(x){x'});

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johnson saldanha 2018-11-29

在 MATLAB Online 中打开

T=readtable('finalcycle.xlsx');
data2=[T(:,1),T(:,2),T(:,3),T(:,4)];
data1=table2array(data2);
v=data1(:,2);
ii = zeros(size(v));
jj = v > 0;
ii(strfind([0,jj(:)'],[0 1])) = 1;
idx = cumsum(ii).*jj;
out = accumarray( idx(jj),v(jj),[],@(x){x'});