group every ten cell array

Hi all i have a cell array 1x180 and i want to group by every 10 cells

For example i want the elements from 1 cell till 10 get grouped,11:21, 22:32 etc..

So the new cell should be 1x18

How can i do this?

Answer 1

[Adam Danz]

c = cell(1,180);  % the original 1x180 cell array
newCell = mat2cell(c,1,repmat(10,1,18)); %the new nested cell array

[pasta pontikaki]

Thank you this works fine, but i also want to merge also all the elements, for every ten cells.

Do you know how to do this?

[Adam Danz]

Yeah, I can help with that. I see that each element is a row vector of varying length. Do you want to concatenate them horizontally (example 1 below) or vertically (example 2 below)?

% Example 1
a = [1 2 3 4]; 
b = [5 6 7 8 9 10 11];
result = [1 2 3 4 5 6 7 8 9 10 11]; 

% Example 2
result = [ 1 2 3 4 nan nan nan;
           5 6 7 8 9   10  11 ];

[pasta pontikaki]

horizontally, remember i have a cell array with 180 vectors with different size

[Adam Danz]

Yeah, you can still concatenate them vertically but you'd need to pad the shorter vectors. Here are both methods:

Concatenate horizontally

newCellMerge = cellfun(@(x)[x{:}],newCell, 'UniformOutput', false); 

Concatenate vertically, pad with NaN values at the end of short vectors

newCellMerge = cell(size(newCell)); 
for i = 1:length(newCell)
    len = cellfun(@length, newCell{i});
    cellPad = cellfun(@(x,y)padarray(x',y,NaN,'post')',newCell{i}, num2cell(max(len)-len),'UniformOutput',false)';
    newCellMerge{i} = cell2mat(cellPad); 
end

[pasta pontikaki]

please sir with all duly respect could you please answer in this question if you know

https://www.mathworks.com/matlabcentral/answers/463117-how-to-get-maxima-of-rho-in-hough-table?s_tid=prof_contriblnk

I will realy appreciate this it is a matter of life or death for my homework