計算機語言 ( 大一, 第二学期 ) 福島康裕 助理教授, 環境系統工程研究室 ext

Last Week’s Exercise Why sort by GDP per capita? Why calculate GDP? What is cumulative income?

Lorenz curve for global economy Objective: To show how uneven our global economy is. Ideal data? Ask each 6.5 billion people how much income they have every year  impossible Realistic data Look at GDP of the country, and assume that everyone in a country has the same income. Each person’s income = GDP of his or her country / Population of his or her country = GDP per capita

Procedures 1. Sort by GDP per capita 2. Calculate GDP and its accumulation We don’t want to have every 6.5 billion data on our excel sheet We assumed everyone in a country has same income. Thanks to this assumption, we can add each person’s income (= GDP per capita) for each country by calculating GDP 3. Obtain accumulation of population 4. Normalize 2 and 3 5. Plot in a scattergram 6. Calculate Gini’s coefficient

Gini’s coefficient How can we calculate Gini’s coefficient? Hints: - △ OAB=0.5 - There are two parts inside △ OAB. If we know one, we can calculate the other O A B Which part? How?

Extracting data Get the data that matches to our interest Using “Auto Filter” Using “Custom Auto Filter” EXAMPLE) Which are the countries that are 1% < r < 2% (population growth rate) in America or Europe ?

Custom Auto Filter

Auto Filter (GDP per capita  top ten) If you choose Europe, you can get EU countries that are in Top 10 in GDP per capita.

More complex query using Auto Filter Benn’s Diagram : AND and OR ABC ● AND ● = C ● OR ● = A+B+C 10,000 < GDP per capita < 20,000 10,000 < GDP per capita AND? GDP per capita < 20,000 OR?

Custom Auto Filter

Custom Auto Filter Dialog = : equals < : is greater than > : is less than ≦ : is greater than or equals to ≧ : is less than or equals to <> : does not equal

EXAMPLE) Which are the countries that are 1% < r < 2% (population growth rate) in America or Europe ?

EXAMPLE) Which are the countries that are 1% < r < 2% (population growth rate) in America or Europe ?

EXAMPLE) Which are the countries that are 1% < r < 2% (population growth rate) in America or Europe ?