Populating matrix with coordinates of each element
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Hi Guys,
I am trying to populate a 100x100 matrix so that the first element is assigned to 1 and the last element is assigned to 100.
Any suggestions? I've already create the specified matrix using zeros and ones but I am guessing I have to use a nested for-loop with the outer looping over the rows and the inner looping over the columns to reassign each element?
Any assistance would be much appreciated.
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DGM
el 29 de Ag. de 2021
Editada: DGM
el 29 de Ag. de 2021
For your example using row-wise linear indexing:
s = [5 10]; % output size
reshape(1:prod(s),s(2),s(1)).'
Obviously, you'd change s to suit your needs. To do the same thing columnwise:
s = [5 10]; % output size
reshape(1:prod(s),s(1),s(2))
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DGM
el 31 de Ag. de 2021
.' transposes the array. For a 2D array, t's the same as doing
Atranspose = permute(A,[2 1]);
Since reshape() fills the result along columns, and the requirements need the indices ordered along rows, I have reshape generate the transpose of the desired array (hence the dimension order swap).
s = [5 10]; % output size
result = reshape(1:prod(s),s(2),s(1)) % with no transpose
Transposing gives the correct orientation.
result = result.'
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