# L-13 MCS 260 10 Feb 2010 : a function

# Evaluate the probability density function
# of a normal distribution.

def npdf ( x, mu = 0, sigma = 1 ):
   "normal probability density function"
   import math
   f = math.exp(-(x - mu)**2/(2*sigma**2))
   f = f/(sigma*math.sqrt(2*math.pi))
   return f

x = input('give x : ')
print 'f(', x , ') = ' , npdf(x)
m = input('give mean : ')
s = input('give standard deviation : ')
print 'for mu = ', m, 'and sigma = ', s
print 'f(', x , ') = ' , npdf(mu=m,sigma=s,x=x)