Manipolation of Cell Arrays.

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Maurizio 2011-12-19

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https://ww2.mathworks.cn/matlabcentral/answers/24331-manipolation-of-cell-arrays

I have {A}=<250x22>cell. thanks to another question I'm able to know the pairs of two colums of {A} for example I have just these three combination :{a}&{b} or {b}&{z} or {r}&{t}. What I would like to create three different cell arrays based on the three combination.

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采纳的回答

Fangjun Jiang 2011-12-19

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https://ww2.mathworks.cn/matlabcentral/answers/24331-manipolation-of-cell-arrays#answer_31941

在 MATLAB Online 中打开

A={'a','b',1 2 3;
    'a','b',3 4 5;
    'b','z',3 4 5;
    'b','z',4 5 6;
    'r','t',5 6 7;
    'r','t',6 7 8};
UniqComb={'a','b';'b','z';'r','t'};
N=size(UniqComb,1);
Groups=cell(N,1);
for k=1:N
    index=and(strcmp(A(:,1),UniqComb(k,1)),strcmp(A(:,2),UniqComb(k,2)));
    Groups{k}=A(index,:);
end
    >> Groups{1}
    Groups{2}
    Groups{3}
  ans = 
      'a'    'b'    [1]    [2]    [3]
      'a'    'b'    [3]    [4]    [5]
  ans = 
      'b'    'z'    [3]    [4]    [5]
      'b'    'z'    [4]    [5]    [6]
  ans = 
      'r'    't'    [5]    [6]    [7]
      'r'    't'    [6]    [7]    [8]

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Maurizio 2011-12-20

@ Fangjun... is it possible to create a for loop that for each Groups{} sum all the number that I have only on the column 3 and 4?

Fangjun Jiang 2011-12-20

>> sum([Groups{k}{:,3}])

ans =

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Walter Roberson 2011-12-19

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https://ww2.mathworks.cn/matlabcentral/answers/24331-manipolation-of-cell-arrays#answer_31942

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a_1 = strcmp('a', A(:,1));
b_1 = strcmp('b', A(:,1));
b_2 = strcmp('b', A(:,2));
r_1 = strcmp('r', A(:,1));
t_2 = strcmp('t', A(:,2));
mab = A(a_1 & b_2, :);
mbz = A(b_1 & z_2, :);
mrt = A(r_1 & t_2, :);