Improved Qrginv Algorithm for Computing Moore-Penrose Inverse Matrices

Table 3

Error and computational time results for cycol (rank = 50, cond = 3.7045𝑒+048).

Method	Time	‖𝐴𝐴^†𝐴−𝐴‖2	‖𝐴^†𝐴𝐴^†−𝐴^†‖2	‖(𝐴𝐴^†)^𝑇−(𝐴𝐴^†)‖2	‖(𝐴^†𝐴)^𝑇−(𝐴^†𝐴)‖2
qrginv	0.2816	1.5114𝑒−013	2.3446𝑒−017	1.1512𝑒−015	8.8889𝑒−016
IMqrginv	0.2334	8.1308𝑒−014	1.4034𝑒−017	1.0225𝑒−015	8.2643𝑒−016