** Count of floating point operations. **

** FLOPS returns the cumulative number of floating point **

** operations. FLOPS(0) resets the count to zero. **

** It is not feasible to count absolutely all floating point **

** operations, but most of the important ones are counted. **

** Additions and subtractions are one flop if real and two if **

** complex. Multiplications and divisions count one flop each **

** if the result is real and six flops if it is not. **

** Elementary functions count one if real and more if complex. **

** Some examples. If A and B are real N-by-N matrices, then **

** A + B counts N^2 flops, **

** A * B counts 2*N^3 flops, **

** A ^ 100 counts 99*2*N^3 flops, **

** LU (A) counts roughly (2/3)*N^3 flops. **

** **