Vertical concatenation of cell array of different dimensions

Question

SP 2022-7-13

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https://ww2.mathworks.cn/matlabcentral/answers/1758650-vertical-concatenation-of-cell-array-of-different-dimensions

回答： Jash Kadu 2022-7-13

Hi,

I am having two cell array of different dimensions, like a = 1*28 and b= 1*30. I need to concatenate vertically and in the form of c = 2*30. The missing cells in cell array should be zero. How can I do this? Kindly help me with this. Thanks in advance.

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Answer 1

Jash Kadu 2022-7-13

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Hi,

a = 1*28

b = 1*30

By using this MATLAB will automatically fill missing elements with zeros.

a(numel(b)) = 0;

For Vertical concatenation:

c = [a;b]

c will now be 2*30

You can also refer to the following documentation for more information:

https://www.mathworks.com/help/matlab/ref/double.cat.html

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Answer 2

Chunru 2022-7-13

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% I am having two cell array of different dimensions, like a = 1*28 and b= 1*30. 
% I need to concatenate vertically and in the form of c = 2*30. The missing cells 
% in cell array  should be zero
% Some example data
a = cell(1, 5);  % 28
a{1} = rand(3); a{5}="abc";
b = cell(1, 7);  % 30
b{1} = rand(2); b{7}="def";
c = num2cell(zeros(2,7));  % 30
c(1, 1:5) = a; 
c(2, 1:7) = b;
c
c = 2×7 cell array
    {3×3 double}    {0×0 double}    {0×0 double}    {0×0 double}    {["abc"   ]}    {[       0]}    {[    0]}
    {2×2 double}    {0×0 double}    {0×0 double}    {0×0 double}    {0×0 double}    {0×0 double}    {["def"]}