def STD(f):
... s=0
... for i in range(len(f)):
... s+=f[i]
... m=s/len(f)
... e=0
... for i in range(len(f)):
... e+=(f[i]-m)**2
... se=math.sqrt(e/len(f))
... print(se)
def rsin(n):
sa=[]
r=0.0
while r<numpy.pi*2:
sa.append(numpy.sin(r))
r+=n
plt.plot(sa)
plt.show()
>>>rsin(0.05)