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Mohamed Belfadel
ap-belfadel-mohamed
Commits
e1ef51aa
Commit
e1ef51aa
authored
1 year ago
by
Belfadel Mohamed
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analyse_tris2.py question2
parent
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TP8/analyse_tris.csv
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TP8/analyse_tris.csv
TP8/analyse_tris2.py
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TP8/analyse_tris2.py
TP8/tris_nbcomp.png
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TP8/analyse_tris.csv
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taille;"tri séléction";"tri insertion"
0; 0.00; 0.00
1; 0.00; 0.00
2; 1.00; 1.00
3; 3.00; 2.76
4; 6.00; 4.82
5; 10.00; 7.52
6; 15.00; 11.22
7; 21.00; 15.06
8; 28.00; 19.92
9; 36.00; 23.42
10; 45.00; 28.42
11; 55.00; 35.60
12; 66.00; 41.88
13; 78.00; 47.32
14; 91.00; 56.94
15; 105.00; 64.18
16; 120.00; 70.92
17; 136.00; 82.80
18; 153.00; 92.20
19; 171.00; 102.88
20; 190.00; 109.10
21; 210.00; 124.82
22; 231.00; 130.18
23; 253.00; 146.66
24; 276.00; 161.96
25; 300.00; 169.40
26; 325.00; 179.54
27; 351.00; 201.26
28; 378.00; 212.50
29; 406.00; 224.52
30; 435.00; 245.34
31; 465.00; 260.58
32; 496.00; 271.32
33; 528.00; 295.56
34; 561.00; 307.54
35; 595.00; 334.18
36; 630.00; 358.66
37; 666.00; 367.52
38; 703.00; 380.28
39; 741.00; 410.68
40; 780.00; 418.60
41; 820.00; 455.84
42; 861.00; 463.90
43; 903.00; 486.88
44; 946.00; 501.62
45; 990.00; 546.30
46; 1035.00; 562.72
47; 1081.00; 590.30
48; 1128.00; 616.72
49; 1176.00; 623.34
50; 1225.00; 666.34
51; 1275.00; 674.36
52; 1326.00; 713.56
53; 1378.00; 734.34
54; 1431.00; 769.80
55; 1485.00; 780.88
56; 1540.00; 833.92
57; 1596.00; 844.72
58; 1653.00; 890.36
59; 1711.00; 914.04
60; 1770.00; 939.12
61; 1830.00; 975.28
62; 1891.00; 1026.10
63; 1953.00; 1023.50
64; 2016.00; 1064.12
65; 2080.00; 1089.02
66; 2145.00; 1156.74
67; 2211.00; 1169.76
68; 2278.00; 1213.86
69; 2346.00; 1217.68
70; 2415.00; 1242.02
71; 2485.00; 1317.76
72; 2556.00; 1313.18
73; 2628.00; 1363.12
74; 2701.00; 1418.40
75; 2775.00; 1466.94
76; 2850.00; 1496.98
77; 2926.00; 1540.84
78; 3003.00; 1581.18
79; 3081.00; 1583.32
80; 3160.00; 1653.38
81; 3240.00; 1701.74
82; 3321.00; 1769.40
83; 3403.00; 1774.48
84; 3486.00; 1828.00
85; 3570.00; 1857.48
86; 3655.00; 1899.12
87; 3741.00; 1926.82
88; 3828.00; 2014.10
89; 3916.00; 2011.46
90; 4005.00; 2048.14
91; 4095.00; 2110.86
92; 4186.00; 2201.62
93; 4278.00; 2229.68
94; 4371.00; 2297.28
95; 4465.00; 2349.78
96; 4560.00; 2348.66
97; 4656.00; 2444.30
98; 4753.00; 2462.70
99; 4851.00; 2497.82
100; 4950.00; 2573.92
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TP8/analyse_tris2.py
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#!/usr/bin/python3
# -*- coding: utf-8 -*-
"""
:mod:`analyse_tris` module
:author: FIL - Faculté des Sciences et Technologies - Univ. Lille <http://portail.fil.univ-lille1.fr>_
:date: janvier 2017
:dernières révisions: février 2018, février 2019
Analyse empirique des tris
"""
from
random
import
shuffle
from
typing
import
Callable
from
compare
import
compare
from
ap_decorators
import
count
from
tris
import
*
from
functools
import
cmp_to_key
################################################
# ANALYSE EMPIRIQUE DES TRIS #
################################################
# ajout d'un compteur à la fonction compare
compare
=
count
(
compare
)
def
analyser_tri
(
tri
:
Callable
[[
list
[
T
],
Callable
[[
T
,
T
],
int
]],
NoneType
],
nbre_essais
:
int
,
taille
:
int
)
->
float
:
"""
renvoie: le nombre moyen de comparaisons effectuées par l
'
algo tri
pour trier des listes de taille t, la moyenne étant calculée
sur n listes aléatoires.
précondition: n > 0, t >= 0, la fonc
"""
res
=
0
for
i
in
range
(
nbre_essais
):
compare
.
counter
=
0
l
=
[
k
for
k
in
range
(
taille
)]
shuffle
(
l
)
tri
(
l
,
compare
)
res
+=
compare
.
counter
return
res
/
nbre_essais
def
tri_sort
(
l
:
list
[
T
],
compare
:
Callable
[[
T
,
T
],
int
])
->
None
:
l
.
sort
(
key
=
cmp_to_key
(
compare
))
if
(
__name__
==
'
__main__
'
):
from
matplotlib
import
pyplot
as
plt
# Calcul de nombres moyens de comparaison pour des listes
# de tailles comprises entre 0 et TAILLE_MAX
NB_ESSAIS
=
50
TAILLE_MAX
=
100
c_select
=
[
0.0
]
*
(
TAILLE_MAX
+
1
)
c_insert
=
[
0.0
]
*
(
TAILLE_MAX
+
1
)
c_sort
=
[
0.0
]
*
(
TAILLE_MAX
+
1
)
for
t
in
range
(
TAILLE_MAX
+
1
):
c_select
[
t
]
=
analyser_tri
(
tri_select
,
1
,
t
)
# inutile de moyenner pour le tri par sélection
c_insert
[
t
]
=
analyser_tri
(
tri_insert
,
NB_ESSAIS
,
t
)
c_sort
[
t
]
=
analyser_tri
(
tri_sort
,
NB_ESSAIS
,
t
)
# Sauvegarde des données calculées dans un fichier au format CSV
prem_ligne
=
'
taille;
"
tri séléction
"
;
"
tri insertion
"
\n
'
ligne
=
'
{:3d};{:8.2f};{:8.2f}
\n
'
with
open
(
'
analyse_tris.csv
'
,
'
wt
'
,
encoding
=
'
utf8
'
)
as
sortie
:
sortie
.
write
(
prem_ligne
)
for
t
in
range
(
TAILLE_MAX
+
1
):
sortie
.
write
(
ligne
.
format
(
t
,
c_select
[
t
],
c_insert
[
t
],
))
# Représentation graphique
plt
.
plot
(
list
(
range
(
TAILLE_MAX
+
1
)),
c_select
,
'
b.
'
,
label
=
'
Tri sélection
'
)
plt
.
plot
(
list
(
range
(
TAILLE_MAX
+
1
)),
c_insert
,
'
r.
'
,
label
=
'
Tri insertion
'
)
plt
.
plot
(
list
(
range
(
TAILLE_MAX
+
1
)),
c_sort
,
'
g.
'
,
label
=
'
Tri sort
'
)
plt
.
title
(
'
Tris : nbre de comparaisons
'
)
plt
.
legend
()
plt
.
xlabel
(
'
n = taille des listes
'
)
plt
.
ylabel
(
'
c(n) = nbre de comparaisons
'
)
plt
.
savefig
(
'
tris_nbcomp.png
'
)
plt
.
show
()
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TP8/tris_nbcomp.png
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e1ef51aa
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