From cell array to matrix

Hello! I have cell arrays, help me deal with the loop.

for i = 1:length(Animal)-1
Y=[X{i}];
end

data looks like this % X{1}=[0] X{2}=[0 1.2 1.4 1.6] X{3}=[0] X{4}=[0 1.3 1.5 1.6]....

My task is to create a 4x800 matrix, where if zero is the column [0 0 0 0], and the values ​​will be in the column

Answer 1

[Andrei Bobrov]

Y = cell2mat(cellfun(@(x)[x(:);zeros(4-numel(x),1)],X,'un',0));

[Lev Mihailov]

Error using cat
Dimensions of matrices being concatenated are not consistent.

Error in cell2mat (line 75)
            m{n} = cat(2,c{n,:});

Error in Animal (line 9402)
Y = cell2mat(cellfun(@(x)[x(:);zeros(4-numel(x),1)],X,'un',0));

[Andrei Bobrov]

Hi Lev!

Please attach your data X as mat-file.

[Andrei Bobrov]

Variant:

n = cellfun(@(x)numel(x(:)),X);
m = max(n);
k = numel(X);
Y = zeros(m,k);
for ii = 1:k
    Y(1:n(ii),ii) = x{ii};
end

Answer 2

[Felix Albrecht]

Try preallocating with zeros:

Y = zeros(4,800);
% Assuming that length(Animal)-1 = 800
for i = 1:length(Animal)-1
Y(:,i) = X{i};
end

[Andrei Bobrov]

+1

[Lev Mihailov]

Y = zeros(4,800);   
% Assuming that length(Animal)-1 = 800  length(Animal)=801
for i = 1:length(Animal)-1
Y(:,i) = X{i};  % X{i} 1x800
end
Index exceeds matrix dimensions.

Error in Max_int2407edt (line 9408)

what could be wrong?