_C_o_l_u_m_n _L_a_b_e_l_s
	
	     colnames(x)
	     colnames(x) <- namevector
	
	_V_a_l_u_e:
	
	     This function can be used to retrieve or set the column
	     labels of a matrix.
	
	_S_e_e _A_l_s_o:
	
	     dimnames, rownames.