Changing OpenJDK8 to OpenJDK11 on CentOS7
Description I changed java environment from OpenJDK8 to OpenJDK11 and wrote the procedure to do it in here. The reason I changed OpenJDK version is simply I think OpenJDK8 is a little old and...
Yearly Archive: 2022
【Python】How to datetime aggregation by pandas
Description Pandas is powerful method to deal with the data and here we are showing how to aggregate by this method with some examples. Data for test We are preparing test data like following.以下のようなテスト用の時系列データフレームを用意します。...
【Python】How to input password in python by getpass
Description When you need to input your ID and Password for certification by program, It’s not good idea to write them as plaintexts in your source code because of security reason. It’s safer to...
Deriving Regression coefficient from Residual Sum of Squares
When Linear Regression equation, \(y=\hat{\alpha} + \hat{\beta} x\), is found from the data, the formula for their coefficients, \(\hat{\alpha}\) and \(\hat{\beta}\), are the followings. $$ \hat{\beta} = r_{xy}\frac{s_{y}}{s_{x}} $$ $$ \hat{\alpha} = \bar{y} –...
Multiple Regression Analysis by Python statsmodels
Overview In this article, there is a explanation of Multiple Regression Analysis by using statsmodels in python. We focus not analyzing but understanding how to use this library. Environments Python 3.8.6 statsmodels 0.13.2 Preparetion...