CMatrix:RowsUsed

The RowsUsed method returns the number of row members in the CMatrix.

used = CMatrix:RowsUsed()

On success, this method returns the number of rows in the matrix.

On failure, this method returns 0.

This method returns the number of columns defined in the row having the most number of columns. This is not the same as the maximum index in any row.

Suppose a CMatrix assigned to M contains 5 members as shown below. There are 3 rows in the matrix, with column indices ranging from 1 to 44:

M = new_matrix()	-- create a CMatrix
M:Set( 50, 44, 1805 )	-- set member
M:Set( 50, 44, -62 )	-- set member
M:Set( 50, 1, 600.5 )	-- set member
M:Set( 3, 44, 102 )	-- set member
M:Set( 120, 44, 25 )	-- set member
Printf("Used = %d", M:RowsUsed())	-- result: Used = 3
M:delete()	-- if finished with M, clean up memory