Harvard:Biophysics 101/Notebook:ZS/2007-2-8: Difference between revisions
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==Assignment 2== | ==Assignment 2== | ||
[[Harvard:Biophysics_101/2007/02/06 |link to assignment]] | [[Harvard:Biophysics_101/2007/02/06 |link to assignment]] | ||
===Code=== | |||
<pre> | |||
#!/usr/bin/env python | |||
#Assignment 2, Zachary Sun (zsun@fas) | |||
from random import * | |||
hcount = 0 | |||
tcount = 0 | |||
string = [] | |||
y = [] | |||
w = [] | |||
u = '' | |||
v = '' | |||
for t in range(10): # creates a list of repetitive T's | |||
u = u + "T" | |||
y.append(u) | |||
for t in range(10): # creates a list of repetitive T's | |||
v = v + "H" | |||
w.append(v) | |||
for i in range(10000): # create the random coin tosses and strings | |||
flip = '' | |||
for z in range(10): | |||
if random() < 0.5: | |||
flip = flip + "H" | |||
hcount = hcount + 1 | |||
else: | |||
flip = flip + "T" | |||
tcount = tcount + 1 | |||
string.append(flip) | |||
for z in y: # counting continuous stretches of T | |||
countStretch = 0 | |||
for i in range(len(string)): | |||
countStretch = countStretch + string[i].count(z) | |||
print z,':',countStretch | |||
print '\n' | |||
for z in w: # counting continuous stretches of H | |||
countStretch = 0 | |||
for i in range(len(string)): | |||
countStretch = countStretch + string[i].count(z) | |||
print z,':',countStretch | |||
</pre> | |||
===Output=== | |||
<pre> | |||
T : 49899 | |||
TT : 15491 | |||
TTT : 6093 | |||
TTTT : 2581 | |||
TTTTT : 1076 | |||
TTTTTT : 471 | |||
TTTTTTT : 194 | |||
TTTTTTTT : 73 | |||
TTTTTTTTT : 29 | |||
TTTTTTTTTT : 7 | |||
H : 50101 | |||
HH : 15652 | |||
HHH : 6152 | |||
HHHH : 2619 | |||
HHHHH : 1131 | |||
HHHHHH : 486 | |||
HHHHHHH : 183 | |||
HHHHHHHH : 76 | |||
HHHHHHHHH : 29 | |||
HHHHHHHHHH : 5 | |||
</pre> |
Latest revision as of 17:01, 7 February 2007
Assignment 2
Code
#!/usr/bin/env python #Assignment 2, Zachary Sun (zsun@fas) from random import * hcount = 0 tcount = 0 string = [] y = [] w = [] u = '' v = '' for t in range(10): # creates a list of repetitive T's u = u + "T" y.append(u) for t in range(10): # creates a list of repetitive T's v = v + "H" w.append(v) for i in range(10000): # create the random coin tosses and strings flip = '' for z in range(10): if random() < 0.5: flip = flip + "H" hcount = hcount + 1 else: flip = flip + "T" tcount = tcount + 1 string.append(flip) for z in y: # counting continuous stretches of T countStretch = 0 for i in range(len(string)): countStretch = countStretch + string[i].count(z) print z,':',countStretch print '\n' for z in w: # counting continuous stretches of H countStretch = 0 for i in range(len(string)): countStretch = countStretch + string[i].count(z) print z,':',countStretch
Output
T : 49899 TT : 15491 TTT : 6093 TTTT : 2581 TTTTT : 1076 TTTTTT : 471 TTTTTTT : 194 TTTTTTTT : 73 TTTTTTTTT : 29 TTTTTTTTTT : 7 H : 50101 HH : 15652 HHH : 6152 HHHH : 2619 HHHHH : 1131 HHHHHH : 486 HHHHHHH : 183 HHHHHHHH : 76 HHHHHHHHH : 29 HHHHHHHHHH : 5