Horizontally concatinating the fields of a structure with different dimensions.
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i have a [1*1] structure containing 30 fields,
variable00,,...... variable29 with size [8193*2, 8192*2....8189*2] (random size every time)
I want to concatinate all the data in one field 'allvariable' but with the dimension missmatch i am unable to do that.
Also is there a way to concatinate only the first rows?
One random data picture is attached.![2019-01-14_11h15_31.png](https://www.mathworks.com/matlabcentral/answers/uploaded_files/200702/2019-01-14_11h15_31.png)
![2019-01-14_11h15_31.png](https://www.mathworks.com/matlabcentral/answers/uploaded_files/200702/2019-01-14_11h15_31.png)
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Accepted Answer
Stephen23
on 14 Jan 2019
Edited: Stephen23
on 14 Jan 2019
The different number of rows does not prevent them from being concatenated vertically:
>> S.f1 = [0,1;2,3;4,5];
>> S.f2 = [6,7;8,9];
>> C = struct2cell(S);
>> vertcat(C{:})
ans =
0 1
2 3
4 5
6 7
8 9
If you want to concatenate horizontally either use indexing:
>> D = cellfun(@(m)m(1:2,:),C,'uni',0);
>> horzcat(D{:})
ans =
0 1 6 7
2 3 8 9
>> catpad(2,C{:})
ans =
0 1 6 7
2 3 8 9
4 5 NaN NaN
2 Comments
Stephen23
on 14 Jan 2019
"Isn't there any simple way to do that? Lets say i am not allowed to use catpad."
The simple solution is to use catpad (it already exists, it works, it only requires one/two lines for you to get what you need). If you really do not want to use catpad then you could certainly use a few loops (or a few cellfun calls) to get the size of each matrix, then pad them as required, and then afterwards concatenate together. You would have to decide if that is "simple" or not.
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