Restructure column vectors into matixes

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Nina Schuback 2020-5-4

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https://ww2.mathworks.cn/matlabcentral/answers/522836-restructure-column-vectors-into-matixes

回答： KSSV 2020-5-4

sub_HOTS.mat

I have a .mat file with several variables, one of them date. The data in all variables are in a one column vector and correspond to each other.

I would like to restructure each vector into a matrix based on the date vectror, i.e. the unique values in the date vector will become one column each, and the same for all other variables.

There must be a easy solution to this using the unique function, but I cannot figure it out.....

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Answer 1

KSSV 2020-5-4

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https://ww2.mathworks.cn/matlabcentral/answers/522836-restructure-column-vectors-into-matixes#answer_430105

在 MATLAB Online 中打开

Let dates be your date and A be your column vector whcih you want to reconstruct.

[C,ia,ib] = uniqur(dates) ;   % if this dont work convert dates to datenum
N = length(C) ; 
iwant = cell(N,1) ;   % cell becuase there is no rule that there will same number of elements to frame matrix
for i = 1:N
    iwant{i} = A(ib==i) ; 
end