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åœå亀éçããã¬ã¯ãŒã¯äººå£å®æ
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ãã®åŸããäœäžãã€ã€ãã2024幎ã§ã 36.8% ãšé«æ°Žæºãç¶æããŠããŸãã
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Python ã³ãŒã
èšäºã®å³è¡šã»çµ±èšæ°å€ãäœæãã Python ã³ãŒãã§ãã
ð¥ïž ããŒã¿ã®æºå
# ããŒã¿ã®ç»é²ïŒåœå亀éçè³æãç·åçè³æããïŒ
# 1975幎ïœã® æ··éçïŒïŒ
ïŒïŒæ±äº¬åã»å€§éªåã»åå€å±å
years1 = [1975, 1989, 1998, 2008, 2014, 2015, 2016, 2017, 2018, 2019, 2020,
2021, 2022, 2023, 2024]
congestion_tokyo1 = [221, 202, 183, 171, 165, 164, 165, 163, 163, 163, 107,
108, 123, 136, 139] # 2014-2019ã¯160å°ã§å®å®
congestion_osaka1 = [199, 168, 147, 130, 123, 124, 125, 125, 126, 126, 103,
104, 109, 115, 116]
congestion_nagoya1 = [205, 175, 157, 139, 131, 134, 130, 131, 132, 132, 104
110, 118, 123, 126]
# 2019幎ïœã® æ±äº¬é¢é£ææšïŒæ··éçïŒæ±äº¬å,ïŒ
ïŒ, ãã¬ã¯ãŒã«ãŒçïŒéŠéœå, ïŒ
ïŒ
# 転å
¥è¶
éæ°ïŒæ±äº¬éœåºéš, å人ïŒ
years2 = list(range(2019, 2025))
congestion_tokyo2 = [163, 107, 108, 123, 136, 139]
telework_tokyo2 = [18.8, 34.1, 42.1, 39.6, 37.6, 36.8]
net_migration_tokyo2 = [70, 22, -8, 20, 48, 54]ãå®è¡çµæããªã
ð¥ïž æ··éçã®äºæž¬ã¢ãã«
# æ··éçã®äºæž¬ã¢ãã«ã®äœæïŒææ°é¢æ°çã«æžå°ããã¢ãã«ïŒ
# ã€ã³ããŒã
import numpy as np
from scipy.optimize import curve_fit
# 2019幎ãŸã§ã®æ±äº¬éœã®æ··éçãç®ç倿°ã幎ã説æå€æ°ãšããŠãã£ããã£ã³ã°
# ææ°é¢æ°ã¢ãã«ã®å®çŸ©
base = 2000 # 幎ã®åºæºç¹
exp_func = lambda X, a, b: a * np.exp(-b * (X - base)) # ææ°é¢æ°ã¢ãã«
# ãã£ããã£ã³ã°ã®å®è¡
popt, _ = curve_fit(exp_func, years1[:10], congestion_tokyo1[:10])
# çµæã®è¡šç€º
print(f'颿° f(year) = {popt[0]:.2f} * exp(-{popt[1]:.5f} * (year - {base}))')ãå®è¡çµæã

ð¥ïž æ··éçã®é·ææšç§»ãšäºæž¬ã®å¯èŠå
# æ··éçã®é·æãã¬ã³ããšäºæž¬
# ã€ã³ããŒã
import matplotlib.pyplot as plt
import japanize_matplotlib
# ãã®PCçšã®èšå®
plt.rcParams['figure.dpi'] = 100
# æç»é åã®èšå®
plt.figure(figsize=(10, 6))
# 1975-2024å¹Žã®æ··éçã®èŠ³æž¬å€ã®æãç·ã°ã©ããæç»
plt.plot(years1, congestion_tokyo1, marker='o', color='tab:red',
label='æ±äº¬å')
plt.plot(years1, congestion_osaka1, marker='s', color='tab:blue',
label='倧éªå')
plt.plot(years1, congestion_nagoya1, marker='^', color='tab:green',
label='åå€å±å')
# æ±äº¬éœã®æ··éçã®ååž°çŽç·ãæç»
years1_extended = list(range(1975, 2025 + 10))
plt.plot(years1_extended, exp_func(np.array(years1_extended), *popt),
ls='--', color='purple', alpha=0.3)
plt.plot(years1_extended[44:], exp_func(np.array(years1_extended), *popt)[44:],
ls='--', color='purple', label='äºæž¬ïŒæ±äº¬åïŒ')
# 修食
plt.title(
'äžå€§éœåžåã®æ··éçã®é·ææšç§»ãšäºæž¬ïŒå®æž¬å€ïŒ1975ã2024幎ãäºæž¬å€ïŒ2025ïœ2034幎ïŒ',
fontsize=14)
plt.xlabel('幎', fontsize=14)
plt.ylabel('æ··éçïŒïŒ
ïŒ', fontsize=14)
plt.legend(fontsize=12)
plt.grid(alpha=0.5)
plt.tight_layout()
plt.show()ãå®è¡çµæã

ð¥ïž æ··éçã»ãã¬ã¯ãŒã«ãŒçã»è»¢å ¥è¶ éæ°ã®æšç§»ã®å¯èŠå
# ã°ã©ãäœæïŒæ··éçã¯å·Šè»žããã¬ã¯ãŒã«ãŒçãšè»¢å
¥è¶
éã¯å³è»žïŒ
fig, ax1 = plt.subplots(figsize=(10, 6))
# å·Šè»žïŒæ··éç
color_red = 'tab:red'
ax1.plot(years2, congestion_tokyo2, marker='o', color=color_red,
label='æ··éçïŒæ±äº¬åïŒ')
ax1.set_xlabel('幎', fontsize=16)
ax1.set_ylabel('æ··éçïŒïŒ
ïŒ', color=color_red, size=14)
ax1.tick_params(axis='y', labelcolor=color_red)
ax1.set_ylim(90, 190)
# å³è»žïŒå
åŽïŒïŒãã¬ã¯ãŒã«ãŒç
color_blue = 'tab:blue'
ax2 = ax1.twinx()
ax2.plot(years2, telework_tokyo2, marker='s', color=color_blue,
label='ãã¬ã¯ãŒã«ãŒçïŒéŠéœåïŒ')
ax2.set_ylabel('ãã¬ã¯ãŒã«ãŒçïŒïŒ
ïŒ', color=color_blue, size=14)
ax2.tick_params(axis='y', labelcolor=color_blue)
ax2.set_ylim(15, 50)
# å³è»žïŒå€åŽïŒïŒè»¢å
¥è¶
éæ°
color_green = 'tab:green'
ax3 = ax1.twinx()
ax3.plot(years2, net_migration_tokyo2, marker='^', color=color_green,
label='転å
¥è¶
éæ°ïŒæ±äº¬éœåºéšïŒ')
ax3.set_ylabel('転å
¥è¶
éæ°ïŒå人ïŒ', color=color_green, size=14)
ax3.tick_params(axis='y', labelcolor=color_green)
ax3.set_ylim(-30, 115)
ax3.spines['right'].set_position(('axes', 1.1))
# å¡äŸ
fig.legend(loc='upper left', bbox_to_anchor=(0.1, 0.9))
fig.suptitle('æ±äº¬ã®æ··éçã»ãã¬ã¯ãŒã«ãŒçã»è»¢å
¥è¶
éæ°ã®æšç§»ïŒ2019ã2024幎ïŒ',
fontsize=14)
fig.tight_layout()
plt.show()ãå®è¡çµæã

ð¥ïž æ··éçã»ãã¬ã¯ãŒã«ãŒçã»è»¢å ¥è¶ éæ°ã®çžé¢ä¿æ°
# æ··éçã»ãã¬ã¯ãŒã«ãŒçã»è»¢å
¥è¶
éæ°ã®çžé¢ä¿æ°ã®ç®åº 2019ã2024幎
# ã€ã³ããŒã
import pandas as pd
# çžé¢ä¿æ°ã®èšç®
pd.DataFrame({
'æ··éç': congestion_tokyo2,
'ãã¬ã¯ãŒã«ãŒç': telework_tokyo2,
'転å
¥è¶
éæ°': net_migration_tokyo2
}).corr().round(2)ãå®è¡çµæã

ð¥ïž æ··éçã»ãã¬ã¯ãŒã«ãŒçã»è»¢å ¥è¶ éæ°ã®ç¡çžé¢ã®æ€å®
# çžé¢ä¿æ°ãšç¡çžé¢ã®æ€å®
# ã€ã³ããŒã
import scipy.stats as stats
# çžé¢ä¿æ°ãšç¡çžé¢ã®æ€ã®å®è¡
print('ãçžé¢ä¿æ°ãšç¡çžé¢ã®æ€å®ã')
print('- æ··éçãšãã¬ã¯ãŒã«ãŒç')
print(' ', stats.pearsonr(congestion_tokyo2, telework_tokyo2))
print('- æ··éçãšè»¢å
¥è¶
éæ°')
print(' ', stats.pearsonr(congestion_tokyo2, net_migration_tokyo2))
print('- ãã¬ã¯ãŒã«ãŒçãšè»¢å
¥è¶
éæ°')
print(' ', stats.pearsonr(telework_tokyo2, net_migration_tokyo2))ãå®è¡çµæã

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