def BisectionMethod(x0,x1,fcn):
#stopping Criterion
tol = 0.0000000000001
fx = lambda x: fcn(x)[1] - E
while abs(x0-x1)> tol:
d = (x0+x1)/2.0
if (fx(x0)*fx(d)) < 0:
x1 = d
else:
x0 = d
if sun_angle.sun_azel(d)[0]<200:
return BisectionMethod(d+tol,24,fcn)
return x0
import matplotlib.pylab as plt
plt.ion()
import sun_angle
# Bisection Method
def BisectionMethod(x0,x1,fcn):
#stopping Criterion
tol = 0.0000000000001
fx = lambda x: fcn(x)[1] - E
while abs(x0-x1)> tol:
d = (x0+x1)/2.0
if (fx(x0)*fx(d)) < 0:
x1 = d
else:
x0 = d
if sun_angle.sun_azel(d)[0]<200:
return BisectionMethod(d+tol,24,fcn)
return x0
E = 17.23528526
print 'Elevation angle is', E, 'degrees'
h= BisectionMethod(0,24,sun_angle.sun_azel)
print "Hours: ", int(math.modf(h)[1]),', Minutes: ', int(round(math.modf(h)[0]*60))
azel = sun_angle.sun_azel(h) # h=18 is 6:00pm
print 'Azimuth A =', azel[0], ', Elevation E =', azel[1]
