From 185a9e4f00d9269a3711ada8ce5daf9de7a8173e Mon Sep 17 00:00:00 2001
From: Egor Tensin <Egor.Tensin@gmail.com>
Date: Sun, 17 Apr 2016 23:32:44 +0300
Subject: refactoring + better plot captions

---
 plot.py | 75 +++++++++++++++++++++++++++++++++++++----------------------------
 1 file changed, 43 insertions(+), 32 deletions(-)

(limited to 'plot.py')

diff --git a/plot.py b/plot.py
index 2771467..6163363 100644
--- a/plot.py
+++ b/plot.py
@@ -4,63 +4,74 @@
 
 from enum import Enum
 import gc
+import pylab
 from time import clock
 
-class InputKind(Enum):
-    SORTED, RANDOMIZED, REVERSED = 'sorted', 'randomized', 'reversed'
+class OrderType(Enum):
+    ASCENDING, RANDOM, DESCENDING = 'ascending', 'random', 'descending'
 
     def __str__(self):
         return self.value
 
+    def get_case(self):
+        if self is OrderType.ASCENDING:
+            return 'best'
+        elif self is OrderType.DESCENDING:
+            return 'worst'
+        elif self is OrderType.RANDOM:
+            return 'average'
+        else:
+            raise NotImplementedError(
+                'unknown "case" for input ordering: \'{}\''.format(self))
+
 def get_timestamp():
     return clock()
 
 def init_clock():
     get_timestamp()
 
-def gen_input(kind, n):
-    if kind is InputKind.SORTED:
+def gen_input(order, n):
+    if order is OrderType.ASCENDING:
         return list(range(n))
-    elif kind is InputKind.REVERSED:
+    elif order is OrderType.DESCENDING:
         return sorted(range(n), reverse=True)
-    elif kind is InputKind.RANDOMIZED:
+    elif order is OrderType.RANDOM:
         from random import sample
         return sample(range(n), n)
     else:
         raise NotImplementedError(
-            'invalid initial input state \'{}\''.format(kind))
+            'invalid input ordering: \'{}\''.format(order))
 
-def measure_running_time(algorithm, kind, xs_len, repetitions):
-    xs = gen_input(kind, xs_len)
-    xss = [list(xs) for _ in range(repetitions)]
+def measure_running_time(algorithm, order, xs_len, iterations):
+    xs = gen_input(order, xs_len)
+    xss = [list(xs) for _ in range(iterations)]
     algorithm = algorithm.get_function()
     gc.disable()
     started_at = get_timestamp()
-    for i in range(repetitions):
+    for i in range(iterations):
         algorithm(xss[i])
     finished_at = get_timestamp()
     gc.enable()
     return finished_at - started_at
 
-def _decorate_plot(algorithm, repetitions, kind, plt):
-    plt.grid()
-    plt.xlabel('Input length')
-    plt.ylabel('Running time (sec)')
-    plt.title('{}, {} repetition(s), {} input'.format(
-        algorithm.get_display_name(), repetitions, kind))
+def _decorate_plot(algorithm, iterations, order):
+    pylab.grid()
+    pylab.xlabel("Input length")
+    pylab.ylabel('Running time (sec), {} iteration(s)'.format(iterations))
+    pylab.title("{}, {} case".format(
+        algorithm.get_display_name(), order.get_case()))
 
-def plot_algorithm(algorithm, repetitions, kind, min_len, max_len, output_path=None):
-    import matplotlib.pyplot as plt
-    _decorate_plot(algorithm, repetitions, kind, plt)
+def plot_algorithm(algorithm, iterations, order, min_len, max_len, output_path=None):
+    _decorate_plot(algorithm, iterations, order)
     xs_lengths = range(min_len, max_len + 1)
     running_time = []
     for xs_len in xs_lengths:
-        running_time.append(measure_running_time(algorithm, kind, xs_len, repetitions))
-    plt.plot(xs_lengths, running_time)
+        running_time.append(measure_running_time(algorithm, order, xs_len, iterations))
+    pylab.plot(xs_lengths, running_time)
     if output_path is None:
-        plt.show()
+        pylab.show()
     else:
-        plt.savefig(output_path)
+        pylab.savefig(output_path)
 
 if __name__ == '__main__':
     import algorithms.registry
@@ -77,7 +88,7 @@ if __name__ == '__main__':
         return n
     def input_kind(s):
         try:
-            return InputKind(s)
+            return OrderType(s)
         except ValueError:
             raise argparse.ArgumentError()
 
@@ -86,13 +97,13 @@ if __name__ == '__main__':
     parser.add_argument('--algorithm', '-l', required=True,
                         choices=algorithms.registry.get_codenames(),
                         help='specify sorting algorithm to use')
-    parser.add_argument('--repetitions', '-r',
+    parser.add_argument('--iterations', '-r',
                         type=positive_number, default=1,
-                        help='set number of sorting repetitions')
-    parser.add_argument('--input', '-i',
-                        choices=tuple(x for x in InputKind),
-                        type=input_kind, default=InputKind.RANDOMIZED,
-                        help='choose initial input state')
+                        help='set number of algorithm iterations')
+    parser.add_argument('--order', '-i',
+                        choices=tuple(x for x in OrderType),
+                        type=input_kind, default=OrderType.RANDOM,
+                        help='specify input order')
     parser.add_argument('--min', '-a', type=natural_number,
                         required=True, dest='min_len',
                         help='set min input length')
@@ -107,6 +118,6 @@ if __name__ == '__main__':
 
     init_clock()
     plot_algorithm(algorithms.registry.get(args.algorithm),
-                   args.repetitions, args.input,
+                   args.iterations, args.order,
                    args.min_len, args.max_len,
                    args.output_path)
-- 
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