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pengcheng on 13 Oct 2014
Answered: Josep Llobet on 1 Oct 2021
Accepted Answer: Star Strider
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>> Q{1}
ans =
'4400002970000003533'
'4400002970000003533'
'4400002970000003535'
'4400002970000003536'
'4400002970000003533'
'4400002970000003532'
'4400002970000003537'
>> Q{2}
ans =
'4400002890000146180'
'4400002890000146180'
'4400002970000000026'
I want to get a new cell:
'4400002970000003533'
'4400002970000003533'
'4400002970000003535'
'4400002970000003536'
'4400002970000003533'
'4400002970000003532'
'4400002970000003537'
'4400002890000146180'
'4400002890000146180'
'4400002970000000026'
I don't want to use the function cell2mat, because it is too slow for my program. Do you have any good ideas?
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Accepted Answer
Star Strider on 13 Oct 2014
Open in MATLAB Online
To get the result cell array ‘R’, for instance, vertically concatanate ‘Q{1}’ and ‘Q{2}’:
Q{1} = ['4400002970000003533'
'4400002970000003533'
'4400002970000003535'
'4400002970000003536'
'4400002970000003533'
'4400002970000003532'
'4400002970000003537'];
Q{2} = ['4400002890000146180'
'4400002890000146180'
'4400002970000000026'];
R = {[Q{1}; Q{2}]};
celldisp(R) % Display Result
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pengcheng on 13 Oct 2014
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https://www.mathworks.com/matlabcentral/answers/158461-how-do-i-combine-two-cell-arrays-into-one-cell-array#comment_242725
If i want to combine them from Q{1}to Q{100},i should use a loop ?or you have some good idea,thank you very much
Iain on 13 Oct 2014
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https://www.mathworks.com/matlabcentral/answers/158461-how-do-i-combine-two-cell-arrays-into-one-cell-array#comment_242726
You could try: {[Q{:}]}
pengcheng on 13 Oct 2014
Direct link to this comment
https://www.mathworks.com/matlabcentral/answers/158461-how-do-i-combine-two-cell-arrays-into-one-cell-array#comment_242728
I try to use this,but i doesn't work ,Error using horzcat Dimensions of matrices being concatenated are not consistent.
Star Strider on 13 Oct 2014
Direct link to this comment
https://www.mathworks.com/matlabcentral/answers/158461-how-do-i-combine-two-cell-arrays-into-one-cell-array#comment_242729
Open in MATLAB Online
Thank you Iain!
Simply doing:
R = Q{:};
also works.
Adam on 13 Oct 2014
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https://www.mathworks.com/matlabcentral/answers/158461-how-do-i-combine-two-cell-arrays-into-one-cell-array#comment_242730
Edited: Adam on 13 Oct 2014
Open in MATLAB Online
R = vertcat(Q{:})
seems to work.
Star Strider on 13 Oct 2014
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https://www.mathworks.com/matlabcentral/answers/158461-how-do-i-combine-two-cell-arrays-into-one-cell-array#comment_242732
Open in MATLAB Online
@pengcheng — It is a vertical condatanation, not a horizontal concatanation. The semicolon ; between ‘Q{1}’ and ‘Q{2}’ in my original code is important. It puts ‘Q{1}’ on top of ‘Q{2}’, not beside it, equivalent to:
R = {[Q{1}
Q{2}]};
Adam on 13 Oct 2014
Direct link to this comment
https://www.mathworks.com/matlabcentral/answers/158461-how-do-i-combine-two-cell-arrays-into-one-cell-array#comment_242733
I assume he is referring to the more generic answer of {[Q{:}]} which does horizontal concatenation by default.
It is one of the many cases where someone asks a question using a neat example then when given a correct answer for that it turns out they actually want to solve the general case that wasn't mentioned in the example!!
Star Strider on 13 Oct 2014
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https://www.mathworks.com/matlabcentral/answers/158461-how-do-i-combine-two-cell-arrays-into-one-cell-array#comment_242740
@Adam — The vertcat function is definitely the way to go!
You’re certainly correct on your observation — in more Questions that I care to count, the instance in the question may have little bearing on actual issue!
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More Answers (2)
Chenchal on 3 Nov 2017
cell2mat(Q')
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Josep Llobet on 1 Oct 2021
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Maybe this little function could be useful:
function [celltot] = juntar_cells(cell1, cell2)
celltot = cell1;
for ll_cell2 = 1:length(cell2)
celltot{end + 1} = cell2{ll_cell2};
end
end
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Categories
MATLABLanguage FundamentalsMatrices and ArraysCreating and Concatenating Matrices
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