Improved Qrginv Algorithm for Computing Moore-Penrose Inverse Matrices

Table 2

Error and computational time results for chow (rank = 199, cond = 5.9407𝑒+135).

Method	Time	‖𝐴𝐴^†𝐴−𝐴‖2	‖𝐴^†𝐴𝐴^†−𝐴^†‖2	‖(𝐴𝐴^†)^𝑇−(𝐴𝐴^†)‖2	‖(𝐴^†𝐴)^𝑇−(𝐴^†𝐴)‖2
qrginv	0.0376	3.6711𝑒−013	1.7331𝑒−013	4.4765𝑒−013	2.4702𝑒−013
IMqrginv	0.0187	4.0038𝑒−013	1.7331𝑒−013	2.4448𝑒−013	2.4741𝑒−013