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Data Visualization | Learn SAS | Programming Tips

Rick WicklinMarch 30, 2022 0

Change the missing-value color by using a range attribute map

In an article about how to visualize missing data in a heat map, I noted that the SAS SG procedures (such as PROC SGPLOT) use the GraphMissing style element to color a bar or tile that represents a missing value. In the HTMLBlue ODS style, the color for missing values

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Learn SAS | Programming Tips

Rick WicklinMarch 28, 2022 0

Use a heat map to visualize missing values in longitudinal data

Longitudinal data are measurements for a set of subjects at multiple points in time. Also called "panel data" or "repeated measures data," this kind of data is common in clinical trials in which patients are tracked over time. Recently, a SAS programmer asked how to visualize missing values in a

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Learn SAS | Programming Tips

Rick WicklinMarch 23, 2022 0

Compute properties of discrete probability distributions

This article shows how to compute properties of a discrete probability distribution from basic definitions. You can use the definitions to compute the mean, variance, and median of a discrete probability distribution when there is no simple formula for those quantities. This article is motivated by two computational questions about

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