Transport Econ. - AOKI's copy&paste archive

Python is my boom now since I use again as research in university.
I use English only this page to practice my skill.

assignment issue

f:id:pytho:20200126161848p:plain
in transport "economics" lecture in TokyoTech
This is lecture slide, So I show you it as possible as I can.

code

# -*- coding: utf-8 -*-
"""
Created on Sun Jan 26 14:34:11 2020

@author: aoki
"""
#config
import numpy as np
import matplotlib.pyplot as plt

where=['O1','O2','Market']
x=np.linspace(0,100)#100 is reference value to draw graph
#%%loop
for i in where:
    #initialize
    dummy=[1,1,1]
    total_cost=0
    #case
    for j in range(len(where)):
        if i==where[j]:
            dummy[j]=-1
    #%%cal (100 is reference value to draw graph too
    cost_iron= 20*(100+x*dummy[0])
    cost_coal= 15*(100+x*dummy[1])
    cost_steel=10*(100+x*dummy[2])
    
    total_cost=cost_iron+cost_coal+cost_steel
    #%%output as graph
    plt.plot(x,cost_iron,label='iron')
    plt.plot(x,cost_coal,label='coal')
    plt.plot(x,cost_steel,label='steel')
    plt.plot(x,total_cost,label='total')
    plt.legend()
    plt.title('between '+i+' & Port (reference value)')
    plt.xlabel('distance x: Port to '+i)
    plt.ylabel('cost')
    plt.show()