Blogs

Blogs

Programming Tips

Strengthen your programming skills with tips and techniques from the experts

Data Visualization | Programming Tips

Robert AllisonOctober 20, 2021 0

Which countries consume the most coal?

These days, many countries are moving away from coal, and towards natural gas, hydro, wind, and solar as ways to meet their electricity needs. I had heard that some countries still use a lot of coal (especially those countries with large coal deposits), and I was curious which countries use

Read More

Energy & Utilities

Analytics | Programming Tips

Rick WicklinOctober 18, 2021 0

Crossover and mutation: An introduction to two operations in genetic algorithms

This article uses an example to introduce to genetic algorithms (GAs) for optimization. It discusses two operators (mutation and crossover) that are important in implementing a genetic algorithm. It discusses choices that you must make when you implement these operations. Some programmers love using genetic algorithms. Genetic algorithms are heuristic

Read More

Data Visualization | Programming Tips

Robert AllisonOctober 15, 2021 0

Captain Kirk travels into space!

Recently, the news has been all abuzz about William Shatner traveling into space. This was a cool event because he's the oldest person who has traveled into space (at 90 years old) ... and he was also the iconic Captain Kirk from the original Star Trek television series. This got

Read More

Data Management | Learn SAS | Programming Tips

Leonid BatkhanOctober 14, 2021 0

Introducing TRIMS function to remove any leading and/or trailing characters from SAS strings

Leonid Batkhan introduces multipurpose TRIMS function that removes any leading, trailing or both leading and trailing characters from SAS strings.

Read More

Programming Tips

Ron CodyOctober 13, 2021 0

Encrypting Data Using SAS

There are many reasons why you might want to encrypt data. I use a SAS program to encrypt a list of logon names and passwords. Before we get started describing how to encrypt data, let's discuss some basic concepts concerning encrypting and decrypting data. All computer data is stored as

Read More

Analytics | Programming Tips

Rick WicklinOctober 13, 2021 0

Penalties versus constraints in optimization problems

Sometimes we can learn as much from our mistakes as we do from our successes. Recently, I needed to solve an optimization problem for which the solution vector was a binary vector subject to a constraint. I was in a hurry. Without thinking much about what I was doing, I

Read More

Programming Tips

Peter Styliadis

Peter StyliadisOctober 8, 2021 0

CAS-Action! Executing the SAS DATA Step in SAS Viya

Just because you are using CAS actions doesn't mean you can forget about the powerful SAS DATA step. The dataStep.runCode CAS action is here! Welcome back to my SAS Users blog series CAS Action! - a series on fundamentals. I've broken the series into logical, consumable parts. If you'd like

Read More

Data Visualization | Programming Tips

Robert AllisonOctober 7, 2021 0

Let's dive into some data - SCUBA site data!

SCUBA diving is one of those activities that should be on your bucket list - everyone should experience it at least once! But where should you go diving? ... Coral reefs are always popular - and they are typically in shallow water, making it an 'easy' dive. But, being in

Read More

Learn SAS | Programming Tips

Rick WicklinOctober 6, 2021 0

Logical negation of vectors

In a matrix-vector language such as SAS/IML, it is useful to always remember that the fundamental objects are matrices and that all operations are designed to work on matrices. (And vectors, which are matrices that have only one row or one column.) By using matrix operations, you can often eliminate

Read More

Learn SAS | Programming Tips

SAS JediSeptember 30, 2021 0

Jedi SAS Tricks: 5 Ways to Make Your SAS Code Run Faster

Tired of waiting for answers? Then make your SAS code run faster with these 5 tips.

Read More

Programming Tips

Peter Styliadis

Peter StyliadisSeptember 28, 2021 0

CAS-Action! Executing SQL in SAS Viya

SQL is an important language for any programmer working with data. In SAS Cloud Analytic Services (CAS) you can execute SQL queries using the fedSQL.execDirect CAS action! Welcome back to my SAS Users blog series CAS Action! - a series on fundamentals. I've broken the series into logical, consumable parts.

Read More

Programming Tips

Peter Styliadis

Peter StyliadisSeptember 23, 2021 0

CAS-Action! Simply Distinct - Part 2

In my previous post CAS-Action! Simply Distinct - Part 1 I reviewed using the simple.distinct CAS action to explore distinct and missing values in a distributed CAS table. Welcome back to my SAS Users blog series CAS Action! - a series on fundamentals. I've broken the series into logical, consumable

Read More

Analytics | Learn SAS | Programming Tips

Rick WicklinSeptember 22, 2021 0

Use simulations to evaluate the accuracy of asymptotic results

The field of probability and statistics is full of asymptotic results. The Law of Large Numbers and the Central Limit Theorem are two famous examples. An asymptotic result can be both a blessing and a curse. For example, consider a result that says that the distribution of some statistic converges

Read More

Programming Tips

Ron CodySeptember 21, 2021 0

Fuzzy Matching

The term "fuzzy matching" describes a method of comparing two strings that might have slight differences, such as misspelling or a middle initial in a name included or not included. One of my favorite functions to compare the "closeness" of two strings is the SPEDIS (spelling distance) function. Have you

Read More

Learn SAS | Programming Tips

Rick WicklinSeptember 20, 2021 0

Add an item to a sublist

The SAS/IML language supports lists, which are containers that store other objects, such as matrices and other lists. A primary use of lists is to pack objects of various types into a single symbol that can be passed to and from modules. A useful feature of using lists is that

Read More

Programming Tips

Peter Styliadis

Peter StyliadisSeptember 15, 2021 0

CAS-Action! Simply Distinct - Part 1

Welcome back to my SAS Users blog series CAS Action! - a series on fundamentals. I've broken the series into logical, consumable parts. If you'd like to start by learning a little more about what CAS Actions are, please see CAS Actions and Action Sets - a brief intro. Or

Read More

Analytics | Learn SAS | Programming Tips

Rick WicklinSeptember 15, 2021 0

The partition problem: An optimization approach

I previously wrote about one way to solve the partition problem in SAS. In the partition problem, you divide (or partition) a set of N items into two groups of size k and N-k such that the sum of the items' weights is the same in each group. For example,

Read More

Learn SAS | Programming Tips | Students & Educators

Suzanne MorgenSeptember 13, 2021 0

Top Books for SAS Programmers

The Day of the Programmer is not enough time to celebrate our favorite code-creators. That’s why at SAS, we celebrate an entire week with SAS Programmer Week! If you want to extend the fun and learning of SAS Programmer Week year-round, SAS Press is here to support you with books

Read More

Analytics | Learn SAS | Programming Tips

Rick WicklinSeptember 13, 2021 0

The partition problem

The partition problem has many variations, but recently I encountered it as an interactive puzzle on a computer. (Try a similar game yourself!) The player is presented with an old-fashioned pan-balance scale and a set of objects of different weights. The challenge is to divide (or partition) the objects into

Read More

Data for Good | Data Visualization | Programming Tips

Robert AllisonSeptember 2, 2021 0

Cary NC data - weather

Many cities have Open Data pages. But once you download the data, what can you do with it? This is my sixth in a series of blog posts where I download public data about Cary, NC, and demonstrate how you might analyze that type of data (for Cary, or any

Read More

Learn SAS | Programming Tips

Leonid BatkhanSeptember 2, 2021 0

Removing trailing characters from SAS strings

SAS' Leonid Batkhan shows how to cut away ANY unwanted trailing characters (not just blanks) from SAS text strings to clean up your data.

Read More

Analytics | Programming Tips

Rick WicklinSeptember 1, 2021 0

On the number of bootstrap samples

The number of possible bootstrap samples for a sample of size N is big. Really big. Recall that the bootstrap method is a powerful way to analyze the variation in a statistic. To implement the standard bootstrap method, you generate B random bootstrap samples. A bootstrap sample is a sample

Read More

Data for Good | Data Visualization | Programming Tips

Robert AllisonAugust 31, 2021 0

Cary NC data - parks and trails

Many cities have Open Data pages. But once you download the data, what can you do with it? This is my fifth in a series of blog posts where I download public data about Cary, NC, and demonstrate how you might analyze that type of data (for Cary, or any

Read More

Analytics | Programming Tips

Rick WicklinAugust 30, 2021 0

Bootstrap correlation coefficients in SAS

You can use the bootstrap method to estimate confidence intervals. Unlike formulas, which assume that the data are drawn from a specified distribution (usually the normal distribution), the bootstrap method does not assume a distribution for the data. There are many articles about how to use SAS to bootstrap statistics

Read More

Programming Tips

Peter Styliadis

Peter StyliadisAugust 27, 2021 0

CAS-Action! Show me the ColumnInfo!

Welcome back to my SAS Users blog series CAS Action! - a series on fundamentals. I've broken the series into logical, consumable parts. If you'd like to start by learning a little more about what CAS Actions are, please see CAS Actions and Action Sets - a brief intro. Or

Read More

Learn SAS | Programming Tips

Rick WicklinAugust 25, 2021 0

Convert a symmetric matrix from wide to long form

For graphing multivariate data, it is important to be able to convert the data between "wide form" (a separate column for each variable) and "long form" (which contains an indicator variable that assigns a group to each observation). If the data are numeric, the wide data can be represented as

Read More

Data for Good | Data Visualization | Programming Tips

Robert AllisonAugust 23, 2021 0

Cary NC data - population

Many cities have Open Data pages. But once you download the data, what can you do with it? This is my fourth in a series of blog posts where I download public data about Cary, NC, and demonstrate how you might analyze that type of data (for Cary, or any

Read More

Learn SAS | Programming Tips

Leonid BatkhanAugust 23, 2021 0

Removing leading characters from SAS strings

SAS' Leonid Batkhan shows you how to remove ANY leading characters (not just blanks) from text strings to tidy up your data.

Read More

Analytics | Data Visualization | Programming Tips

Rick WicklinAugust 23, 2021 0

Sliced survival graphs in SAS

This article shows how to create a "sliced survival plot" for proportional-hazards models that are created by using PROC PHREG in SAS. Graphing the result of a statistical regression model is a valuable way to communicate the predictions of the model. Many SAS procedures use ODS graphics to produce graphs

Read More

Previous 1 … 12 13 14 15 16 … 66 Next