Using vertcat for cell array of differing length

Question

L'O.G. 2022-5-4

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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/1711250-using-vertcat-for-cell-array-of-differing-length

编辑： Jonas 2022-5-4

I have a 3 x 2 cell array consisting of elements that are vectors 1 x N where N changes. How do I find the vector of minimum length in the cell array and vertically concatenate based on the length of that vector?

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Dyuman Joshi 2022-5-4

Can you show the data?

Jonas 2022-5-4

编辑：Jonas 2022-5-4

在 MATLAB Online 中打开

it also depends, if you want the minimum length per cell column or if you want all vectors to be cut down to the smallest vector length of all cells. start with

lengthMatrix=cellfun(@numel,yourCell)

to get a matrix of vector lengths, then continue with eg

minLength=min(lengthMatrix,[],'all')
cellWithCutEntries=cellfun(@(in) in(1:minLength),yourCell)

and a

cell2mat(cellWithCutEntries)

call at the end

this concatenates all vectors off all cells using the minimum length

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Answer 1

KSSV 2022-5-4

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此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/1711250-using-vertcat-for-cell-array-of-differing-length#answer_956665

编辑：KSSV 2022-5-4

在 MATLAB Online 中打开

% Make dummy data for demo 
A = cell(3,2) ; 
for i = 1:3
    for j = 1:2
        N = randperm(10,1) ; 
        A{i,j} = rand(1,N) ; 
    end
end
% Get length 
L = cellfun(@numel,A) ; 
% Join L < 5 arrays 
idx = L < 5 ; % GEt indices of cell arrays whos length is less than 5 
B = A(idx) ;
iwant = horzcat(B{:}) % join the cell arrays 