学習環境
新装版 数学読本2 (松坂 和夫(著)、岩波書店)の第7章(急速・緩慢に変化する関係 - 指数関数・対数関数)、7.3(対数関数の性質)、常用対数の問29の解答を求めてみる。
コード
Python 3
#!/usr/bin/env python3
from unittest import TestCase, main
from sympy import pprint, symbols, log, plot
import math
print('29.')
spam = [4.5, 52.83, 600, 72.35, 0.325, 0.4857, 0.008098]
egg = [0.6532, 1.7228, 2.7782, 1.8594, -0.4881, -0.3137, -2.0917]
class MyTestCase(TestCase):
def setUp(self):
pass
def tearDown(self):
pass
def test_math_log10(self):
for s, t in zip(spam, egg):
self.assertAlmostEqual(math.log10(s), t, places=3)
def test_sympy_log10(self):
for s, t in zip(spam, egg):
self.assertAlmostEqual(float(log(s, 10)), t, places=3)
if __name__ == '__main__':
x = symbols('x')
p = plot(log(x, 10),
(x, 0.1, 5.1),
ylim=(-2.5, 2.5),
legend=True,
show=False)
colors = ['red', 'green', 'blue', 'brown', 'orange',
'purple', 'pink', 'gray', 'skyblue', 'yellow']
for s, color in zip(p, colors):
s.line_color = color
p.show()
p.save(f'sample29.png')
main()
入出力結果(Bash、cmd.exe(コマンドプロンプト)、Terminal、Jupyter(IPython))
$ ./sample29.py -v 29. test_math_log10 (__main__.MyTestCase) ... ok test_sympy_log10 (__main__.MyTestCase) ... ok ---------------------------------------------------------------------- Ran 2 tests in 0.010s OK $
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