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cupi.py

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  • numpi.py 460 B
    #
    # numpi.py
    # Neil Gershenfeld 1/23/17
    # calculation of pi by a numpy sum
    # pi = 3.14159265358979323846 
    #
    
    from numpy import *
    import time
    
    NPTS = 100000000
    a = 0.5
    b = 0.75
    c = 0.25
    start_time = time.time()
    i = arange(1,(NPTS+1),dtype=float64)
    pi = sum(0.5/((i-0.75)*(i-.25)))
    end_time = time.time()
    mflops = NPTS*5.0/(1.0e6*(end_time-start_time))
    print("NPTS = %d, pi = %f"%(NPTS,pi))
    print("time = %f, estimated MFlops = %f"%(end_time-start_time,mflops))