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This article shows how to use SAS to fit a growth curve to data. Growth curves model the evolution of a quantity over time. Examples include population growth, the height of a child, and the growth of a tumor cell. This article focuses on using PROC NLIN to estimate the
The SAS INFILE statement can read multiple text files in a single DATA step. Use file name wildcards (like * and ?) and a special FILENAME= option to keep track of which records come from which files.
I often get asked for programming tips. Here, I share three of my favorite tips for beginners. Tip #1: COUNTC and CATS Functions Together The CATS function concatenates all of its arguments after it strips leading and trailing blanks. The COUNTC function counts characters. Together, they can let you operate
Do you want to insert blank rows into your TABULATE procedure tables? Here's a SAS sample and two other methods that will get the job done.
SAS Press author Kirk Paul Lafler's favorite tips using PROC SQL.
데이터 사이언티스트들은 작업 시간의 대부분을 데이터 준비와 피처(feature) 엔지니어링에 할애합니다. 지난 블로그를 통해 데이터 준비 작업에 유용한 프로그래밍 팁을 소개해드렸는데요. 오늘은 인공지능(AI) 기반 엔터프라이즈 분석 플랫폼 ‘SAS 바이야(SAS Viya)’의 기본 템플릿 중 ‘자동화된 피처 엔지니어링 템플릿’을 활용해 손쉽게 예측 모델을 생성하는 방법을 살펴보고자 합니다. 피처는 입력과 변수(독립 변수, 설명 변수)를 의미합니다. 그리고 피처 엔지니어링은 예측
This blog post introduces the use of deep learning to train a deep neural network to further improve performance; and hybrid architectures.
Find out about the new edition of Ron Cody's latest best selling book.
Hybrid computers that marry CPUs and devices like GPUs and FPGAs are the fastest computers, but they are hard to program. This post explains how deep learning (DL) greatly simplifies programming hybrid computers.
How can SAS Grid Manager and SAS Viya work together to process massive volumes of data? Get answers to common questions about how the two interact in this blog post.
This blog post highlights more SAS Global Forum papers chosen by SAS Press authors.
How to count words in SAS with the COUNT functions, and concatenate strings by using the CAT functions. Use these tips to modernize your SAS code!
Three bestselling SAS Press authors feature their favorite papers from SAS Global Forum 2018.
A SAS programmer recently asked how to interpret the "standardized regression coefficients" as computed by the STB option on the MODEL statement in PROC REG and other SAS regression procedures. The SAS documentation for the STB option states, "a standardized regression coefficient is computed by dividing a parameter estimate by
Did you know that the call for content is now open for SAS Global Forum 2019? Get the details and see why next year's Conference Chair MaryAnne DePesquo is excited about the big event in Dallas, Texas, April 28-May 1, 2019.
Visualization of data density estimation, which is often used in statistical analysis and machine learning, will show the data’s characteristics like distribution, skewness and modality, etc. Commonly-used data density visualizations include boxplot, histogram, kernel density estimates, and some other plots. This blog post visualizes the kernel density estimates superimposing on histogram using SAS Visual Analytics.
When I'm at a social gathering, someone always asks what type of work I do. I like to keep my social life separate from my work, therefore I usually give a vague answer such as "software" (and quickly change the topic). How vague or specific is your response? How vague
This article shows how to perform an optimization in SAS when the parameters are restricted by nonlinear constraints. In particular, it solves an optimization problem where the parameters are constrained to lie in the annular region between two circles. The end of the article shows the path of partial solutions
그래프를 만들 때 가장 어려운 작업은 무엇일까요? 바로 데이터를 준비하는 것인데요. 오늘은 엑셀 데이터를 SAS로 가져오고, 전치하고, 첫 열의 값을 데이터 값으로 사용하고, 플롯으로 요약하는 방법을 차례대로 소개해드리고자 합니다. 오늘 예시에서는 학생 대출 채무에 관한 데이터가 사용되는데요. 몇 년 전, 학생 대출 채무가 급증하면서 큰 이슈가 됐었고, 아래는 관련 기사에서 쓰인
Even though I’ve worked at SAS for nearly 30 years, I still get excited when great things come together for our customers! This year we are hosting the very first hackathon at our Analytics Experience conference in San Diego - the AnalyticsX Hackathon. Analytics Experience is in its third year
Elections are in the news again, therefore I have been on the lookout for interesting graphs. I recently found some graphs of the Census Current Population Survey (CPS) Voting and Registration Supplement data, and tried to improve them. Follow along if you're interested in voter data, or creating better graphs!
Hash tables are a very powerful and flexible data structure. Most SAS applications of hash tables focus on just one of their many powerful facilities: table lookup. Hash tables are a fantastic table lookup tool and their use for that should never be diminished. However, hash tables can do so
I peruse many different websites to get my news, and I always keep an eye out for good (or bad) presentations of data. I recently saw a posting on reddit claiming "U.S. GDP is greater than the total of all others combined." This news seemed too good to be true
SAS Viya has opened an entirely new set of capabilities, allowing SAS to analyze on cloud technology in real-time. One of the best new features of SAS Viya is its ability to pair with open source platforms, allowing developers the freedom of language and implementation to integrate with the power
Several weeks ago, I wrote about practical advice from a Chief Data Scientist in my blog “From Aristotle to Pi: Practical advice from a chief data scientist.” Now I want to offer my advice as a newbie trying to navigate through machine learning concepts and how to code them. Over
When you use a regression procedure in SAS that supports variable selection (GLMSELECT or QUANTSELECT), did you know that the procedures automatically produce a macro variable that contains the names of the selected variables? This article provides examples and details. A previous article provides an overview of the 'SELECT' procedures
A programmer recently asked a question on a SAS discussion forum about design matrices for categorical variables. He had generated a design matrix by using PROC GLMMOD and wanted to use the design columns in a subsequent procedure. However, the columns were named COL1, COL2, COL3,..., so he couldn't tell
You should play a little. Add dots. Add color. Your PROC REPORT output does not have to be boring. As a matter of fact, it can be both functional and appealing. Any Unicode value will do, but this blog shows how to use the Unicode value for a dot (filled
Getting started with SAS Viya and RStudio -- making the connection, and submitting my first commands via CAS actions.
