Using horzcat in a loop for combining large number of files
3 次查看(过去 30 天)
显示 更早的评论
hi, I need to combine 100 matrices horizontally using horzcat. I have a matrix named 'data' of size 20*30*100 in which 100 represents number of data granules for a day. I want to do the following: data_all = horzcat(data(:, :, 1), data(:, :, 2), data(:, :, 3) ................... upto 100). I want to do this in a loop since it is tedious to write all matrices from 1 to 100. Could you please suggest a quick way?
1 个评论
Constance Woodman
2017-7-27
编辑:Constance Woodman
2017-7-27
I'm not super elegant at this but would think you would want to do it in one command rather than adding a column, then adding a column, etc., as a loop. I have been working with huge datasets and it can crash matlab on my older work machine when I make Matlab do extra work.
Maybe rather than horizontally concatenating in a loop, you could create a loop that writes the list for concatenation, then just insert the list?
I'm just sort of pseudo coding this out...
% initilize
x = total number columns
counter= 1
hugeFlippingString = empty string
% run loop
Loop until counter = total number of columns
append text to hugeFlippingString: "columnOrFileName", counter, ","
counter increment by 1
End loop
%Concatenate
giantMatrix = horzcat(hugeFlippingString)
% which actually does this: giantMatrix = horzcat(col1,col2, ... col100)
采纳的回答
James Tursa
2017-7-27
编辑:James Tursa
2017-7-27
data_all= reshape(data,size(data,1),[]);
Or, if you needed to vertcat them instead, then you could use
result = reshape(permute(data,[2 1 3]),size(data,2),[])';
0 个评论
更多回答(0 个)
另请参阅
类别
在 Help Center 和 File Exchange 中查找有关 Creating and Concatenating Matrices 的更多信息
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!