concatenate 2 matrix in loop "previous iteration"?

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E 2019-7-27

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https://ww2.mathworks.cn/matlabcentral/answers/473704-concatenate-2-matrix-in-loop-previous-iteration

评论： E 2019-7-27

采纳的回答： KALYAN ACHARJYA

在 MATLAB Online 中打开

i am trying to concatenateconcatenate two matrix

the output i get same line not append previous iterations C with new C

5.0000 3.6000 1.4000 0.2000

while(i ~=4)
    
    Datachunk(i) = next_line;
    
      i = i + 1;
    next_line = fgetl(fid);
    C = cell2mat(textscan(next_line,'%f %f %f %f','Delimiter', ',','CollectOutput', true));
    C4 = [C;C];
    
end

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采纳的回答

KALYAN ACHARJYA 2019-7-27

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此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/473704-concatenate-2-matrix-in-loop-previous-iteration#answer_385070

编辑：KALYAN ACHARJYA 2019-7-27

在 MATLAB Online 中打开

May be you replaced the privious C with current C, use copy privious C with other variable and do the same.

while(i ~=4)
    Datachunk(i) = next_line;
      i = i + 1;
    next_line = fgetl(fid);
    D=C; %privious C, do C initialization (before while loop) for 1st iteration.
    C=cell2mat(textscan(next_line,'%f %f %f %f','Delimiter', ',','CollectOutput', true));
    C=[D;C];
    
end