Programming Tips

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새로워진 SAS 커뮤니티를 소개합니다

오랜 시간동안 많은 사랑을 받아온 SAS 사용자 커뮤니티가 리뉴얼되었습니다. 한국에서 SAS 커뮤니티의 역사는 벌써 30년이 되었습니다. 1990년 SAS코리아 설립 이후 SAS User Group International-Korea(SUGI-K)라는 이름으로 활동한 SAS 사용자 모임이 2007년 MYSAS로 명칭을 바꾸었습니다. 그리고, 2010년 홈페이지를 개편하고 10년 만인 2020년, 사용자 모임의 활성화를 위해 새로운 SAS 커뮤니티 사이트로 여러분을 다시

Programming Tips
Rick Wicklin 0
What is a pooled variance?

The first time I saw a formula for the pooled variance, I was quite confused. It looked like Frankenstein's monster, assembled from bits and pieces of other quantities and brought to life by a madman. However, the pooled variance does not have to be a confusing monstrosity. The verb "to

Programming Tips
Ron Cody 0
Multi-way lookup tables

A lookup table is a programming technique where one or more values can be used to retrieve another value. For example, many years ago, I had benzene exposure estimates for 10 years (1940 to 1949) for each of five locations in a factory. Given a year and a job location,

Programming Tips
Susan Slaughter 0
What's wrong with this code?

Whether you enjoy debugging or hate it, for programmers, debugging is a fact of life. It’s easy to misspell a keyword, scramble your array subscripts, or (heaven forbid!) forget a semicolon. That’s why we include a chapter on debugging in The Little SAS® Book and its companion book, Exercises and

Programming Tips
Rick Wicklin 0
Bilinear interpolation in SAS

This article shows how to perform two-dimensional bilinear interpolation in SAS by using a SAS/IML function. It is assumed that you have observed the values of a response variable on a regular grid of locations. A previous article showed how to interpolate inside one rectangular cell. When you have a

Programming Tips
Rick Wicklin 0
What is bilinear interpolation?

I've previously written about linear interpolation in one dimension. Bilinear interpolation is a method for two-dimensional interpolation on a rectangle. If the value of a function is known at the four corners of a rectangle, an interpolation scheme gives you a way to estimate the function at any point in

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