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...a matrix Hello, I am doing a recursive analysis that uses every line (vector) of a matrix in a loop. In the model, I need to transpose those vectors that are extracted from a matrix. Using simple vectors (no matrix involved) the transpose function works fine: simplevector <-matrix(1:3,3,1) tsimplevector <-t(simplevector) #transposed dim(simplevector) #3x1 matrix (vector) dim(tsimplevector)#1x3 PROBLEM: However, when the vector is extracted from a matrix, its dimension is NULL. In this case the transposed dimension is correct, but you'll see the next example, that if a row was extracted,...