MATLAB: How to store different length of arrays into a single array

arraymatrixvector

In my FOR loop, I will generate 100 different length of the arrays:

array1=[2,3,4,5,6,7,8,99]

array2=[1,3]

array3=[……….]

array100=[…..]

How can I store those arrays into a single array(which is main_array) every time end of my FOR loop.

final main_array:

main_array = [array1,array2,…..arry100]

And how can I get the length of each sub-array?

length = main_array -> array1?

Best Answer

Use a cell array

 array{i}=...

Related Solutions

MATLAB: Concatenate arrays within a loop,

Easy, given any number of arrays in a cell array C. You could use a loop like this, although it is inefficient because the output array is not preallocated:

C = {[1,2],[3,4],...} % cell array of arrays.
A = C{1};
for k = 2:numel(C)
    A = [A;C{k}];
end

Simpler and more efficient would be to concatenate them all at once, without a loop, e.g.:

A = vertcat(C{:})

Whatever you do, do NOT try to access variable names dynamically in a loop! Read this to know why:

https://www.mathworks.com/matlabcentral/answers/304528-tutorial-why-variables-should-not-be-named-dynamically-eval

Using an array (e.g. a cell array) and indexing is much simpler, neater, much more efficient, less buggy, and easier to debug.

MATLAB: Minimum for different sized cell arrays

To get the overall minima over a cell array without caring what the position is,

min( [YourArrayName{:}] )

Best Answer

Related Solutions

MATLAB: Concatenate arrays within a loop,

MATLAB: Minimum for different sized cell arrays

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