Implementing HMA, WMA & SMA with 25 lines of SAS code

With time series data analysis, we can apply moving average methods to predict data points without seasonality. This includes Simple Average (SA), Simple Moving Average (SMA), Weighted Moving Average (WMA), Exponential Moving Average (EMA), etc. For series with a trend but without seasonality, we can use linear, non-linear and autoregressive […]

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Evaluate a function on a linear subspace

This article discusses how to restrict a multivariate function to a linear subspace. This is a useful technique in many situations, including visualizing an objective function that is constrained by linear equalities. For example, the graph to the right is from a previous article about how to evaluate quadratic polynomials. […]

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Hour of Code 2019: CodeSnaps and the Sustainable Development Goals

This year the Hour of Code theme is #CSforgood, with a focus on the United Nations’ Sustainable Development Goals (SDGs). We’re very excited about this theme because we believe computer science and technology play an important role in solving the world’s biggest problems. But the first step in empowering the […]

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Caregiving and the Holidays

If you are a caregiver, the holiday season may bring less Peace and Good Tidings, and more Stress and Frustration.  If you are already feeling overwhelmed with caregiving responsibilities, the holidays may feel more of a burden than a joy.  I think it is fair to say that the holidays are […]

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Plotting NC’s new congressional districts maps for 2020

North Carolina recently re-drew the congressional district boundaries for the upcoming 2020 election. Here’s a copy of the new map, from the ncleg.gov website: A couple of years ago, I created an enhanced version of the 2016/18 map, and I thought I’d do the same for the new 2020 map… […]

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Top 5 ways business glossaries make analytics better

A business glossary improves data quality – one of the top five ways it makes analytics better.

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A Pause for Gratitude

I grew up in Massachusetts. Waking up to a fresh blanket of snow was not unusual on Thanksgiving. I remember the windows on our small, ranch home were often frosty with condensation in the morning.  Mom would take a hand towel to wipe them down. The house was heated with […]

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Tecnología analítica: empezar con los objetivos de negocio

Los datos, y sobre todo su significado y usabilidad, se han ido transformando con el tiempo. Anteriormente hablar de datos era pensar en unos y ceros, en tablas estáticas o incluso en materiales que no se aprovechaban. Hoy, pensar en datos es pensar en la fuente principal de las historias, […]

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Are you a SAS certified professional?

The SAS Global Certification Program started in 1999 and has issued over 150,000 credentials to SAS users. Today, the program offers 23 different credentials across seven categories.

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Evaluate a quadratic polynomial in SAS

What is an efficient way to evaluate a multivariate quadratic polynomial in p variables? The answer is to use matrix computations! A multivariate quadratic polynomial can be written as the sum of a purely quadratic term (degree 2), a purely linear term (degree 1), and a constant term (degree 0). […]

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