Posts Tagged ‘ Uncategorized ’

Three ways to add a line to a Q-Q plot

January 16, 2019
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Three ways to add a line to a Q-Q plot

A quantile-quantile plot (Q-Q plot) is a graphical tool that compares a data distribution and a specified probability distribution. If the points in a Q-Q plot appear to fall on a straight line, that is evidence that the data can be approximately modeled by the target distribution. Although it is

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Let’s track the falling gasoline prices!

January 15, 2019
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When I fill up my daily-driver Prius, the price of gasoline isn't that important. But when I occasionally take a trip in my V8 Suburban, I pay a lot more attention! Therefore I was pleasantly surprised when I noticed that gasoline prices have been falling. How much have they fallen,

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Four more tips about hash tables

January 15, 2019
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Now is your chance to learn even more about SAS hash tables with four additional articles on the subject. The post Four more tips about hash tables appeared first on SAS Learning Post.
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How to align the Y and Y2 axes in PROC SGPLOT

January 14, 2019
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How to align the Y and Y2 axes in PROC SGPLOT

When you overlay two series in PROC SGPLOT, you can either plot both series on the same axis or you can assign one series to the main axis (Y) and another to a secondary axis (Y2). If you use the Y and Y2 axes, they are scaled independently by default,

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Favorite SAS Press books from a SAS Press author

January 10, 2019
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Does this situation sound familiar? You have a complex analysis that must be finished urgently. The data was delivered late and its quality and structure are far from the expected standard. The time pressure to present the results is huge, and your SAS...
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10 posts from 2018 that deserve a second look

January 9, 2019
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10 posts from 2018 that deserve a second look

Numbers don't lie, but sometimes they don't reveal the full story. Last week I wrote about the most popular articles from The DO Loop in 2018. The popular articles are inevitably about elementary topics in SAS programming or statistics because those topics have broad appeal. However, I also write about

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Deming regression for comparing different measurement methods

January 7, 2019
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Deming regression for comparing different measurement methods

Deming regression (also called errors-in-variables regression) is a total regression method that fits a regression line when the measurements of both the explanatory variable (X) and the response variable (Y) are assumed to be subject to normally distributed errors. Recall that in ordinary least squares regression, the explanatory variable (X)

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Top posts from The DO Loop in 2018

January 2, 2019
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Top posts from The DO Loop in 2018

Last year, I wrote more than 100 posts for The DO Loop blog. Of these, the most popular articles were about data visualization, SAS programming tips, and statistical data analysis. Here are the most popular articles from 2018 in each category. Data Visualization Visualize repetition in song lyrics: In one

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