colMaxs                 Maximum/minimum values in columns or rows
colSds                  Standard deviation of columns and rows of large
                        matrices
colZeros                Number of zeros in columns and rows of large
                        matrices
crossprod               Cross-product of large sparse matrices
mask                    Create a pattern matrix for masking
maxCol                  Column or row indices of maximum values
simil                   Compute similarity/distance between rows or
                        columns of large matrices
