I'm currently working on one mathematical algorithm on C, but I found a realization on matlab. The problem is that I don't know syntax. Can anybody explain me whats the meaning of this code?
[data(:,nt)'; zeros(nz-1,nx)]
nz, nx, nt are integers and data is a nx x nt matrix.
data(:,nt) means all rows (:) of column nt of the data matrix. The apostrophe (') means take the transpose of that.
zeros(nz-1,nx) means a matrix filled with zeros of size nz-1 x nx.
The [ ... ; ...] construct means vertical concatenation of the two matrices.
Simon did most of the explaining, but remember that nt might be a matrix. Say nt = [1 2 3 1]. This would return columns 1, 2, 3 and 1 (anew), concatenated horizontally.
data is a nx by nt matrix which implies that nt is a scalar and which also implies that data(:,nt) could have also been written data(:,end).