Basic Question on Imported Data Size
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Hi there! i'm a newbie in Matlab. I have 5x3000 size of imported data (5 row times 3000 data points). How can i change these data size to 1x15000 size (1 row times 15000 (4x3000+3000) data points? I know that I can use this command successfully: data=[data(1,:) data(2,:) data(3,:) data(4,:) data(5,:)]; but is there any short codes that can be used since I also have a big data size (30x3000). If I use the above command, I believe it will not be efficient in terms of command writing.
Rowan on 6 May 2014
the easiest way is to use matrix operations to rearrange the data. e.g. if you want to combine two 3 by 3 matrices, A and B, into a 6 by 3 matrix C (6 rows, 3 columns) you would have for example:
A = ones(3);B = ones(3)*2; (just to show the difference between matrices) then: C = [a;b], which would come out as: C = [1 1 1;1 1 1;1 1 1;2 2 2;2 2 2; 2 2 2]
using this method you can rearrange your imported data, like so: (we'll called the data imported D and the result after rearrangement matrix Dtest)
Dtest = [D(1,:) D(2,:) D(3,:) D(4,:) D(5,:)];
basically D(1,:) means all the data in the first row of matrix D so you just create a new matrix with all the rows of imported data in one line.