Data Modeling

好文
如何建構與評估經濟理論模型

"1.經濟理論模型必須要有實證動機;2. 經濟理論模型必須能夠透過估計檢定或是模擬校準(calibra-
tion) 等方式, 評估該理論模型的良莠"


同樣的對於統計模型 DM modeling 也是吧

Axis scaling algorithm

A good look axes scale usually increase by 10^(x) or 0.5*10^(x) according to the data's range. Dorothy E. Pugh provide an algorithm (and SAS Macro) for generated suitable axis scale, I modified the SAS code into R code


reference:Dorothy E. Pugh(SUGI25), "A Robust Generalized Axis-scaling Macro"