CMatrix:RowsUsed

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

Syntax

nRowsUsed = CMatrix:RowsUsed()

where

    nRowsUsed is the number of rows in the matrix. On failure or if the matrix is empty, 0 is returned.

  

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.

Example

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 = CMatrix:new()

-- 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

Related Topics

Exists

CMatrix class