123

i_save=[]
ynew_min=[]
for i in range(100):
    if xnew[i]>4 and xnew[i]<8:
        i_save.append(i)

#print i_save
#print ynew[i_save]

ynew_min=copy.deepcopy(ynew[i_save])
#print ynew_min
#print (ynew_min, type(ynew_min))
m=min(ynew_min)
print "minimum[4;8] -",m