Учи матчасть ("learn your equipment", jokingly).

'2d' means 'two dimensions', like matrix N x M, for any N and M; thus, matrix 5by5 and 4by6 both are 2d arrays (square matrices). Adding third dimension makes N x M x L (cubic matrix), fourth - N x M x L x K (4d matrix) and so on.

In reply to Re^3: how do i read in ANY 2d array by fisher
in thread how do i read in ANY 2d array by DanielM0412

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