Example 2014.6: Comparing medians and the Wilcoxon rank-sum test

June 12, 2014
By
Example 2014.6: Comparing medians and the Wilcoxon rank-sum test

This post was kindly contributed by SAS and R - go there to comment and to read the full post. A colleague recently contacted us with the following question: “My outcome is skewed– how can I compare medians across multiple categories?” What they were asking for was a generalization of the Wilcoxon rank-sum test...
Read more »

Remove tabs from SAS code files

June 10, 2014
By
Remove tabs from SAS code files

This post was kindly contributed by DATA ANALYSIS - go there to comment and to read the full post. By default, SAS records the indent by pressing the tab key by tab, which causes many problem to use the code files under a different...
Read more »

Use recursion and gradient ascent to solve logistic regression in Python

May 21, 2014
By
Use recursion and gradient ascent to solve logistic regression in Python

This post was kindly contributed by DATA ANALYSIS - go there to comment and to read the full post. In his book Machine Learning in Action, Peter Harrington provides a solution for parameter estimation of logistic regression . I use pandas and ggplot to realize a recursive alternative. Comparing with the...
Read more »

Spring Thaw in Alberta

May 2, 2014
By

Last week I had the great pleasure of flying to Alberta for the Edmonton and Calgary user group meetings. Well, let me say that it mostly a great pleasure... my system was still in a bit of temperature shock having been sunning myself on...
Read more »

Count large chunk of data in Python

April 30, 2014
By

This post was kindly contributed by DATA ANALYSIS - go there to comment and to read the full post. The line-by-line feature in Python allows it to count hard disk-bound data. The most frequently used data structures in Python are list and dictionary. Many...
Read more »

Example 2014.5: Simple mean imputation

April 25, 2014
By

We're both users of multiple imputation for missing data. We believe it is the most practical principled method for incorporating the most information into data analysis. In fact, one of our more successful collaborations is a review of software for ...
Read more »

Example 2014.4: Hilbert Matrix

April 14, 2014
By

Rick Wicklin showed how to make a Hilbert matrix in SAS/IML. Rick has a nice discussion of these matrices and why they might be interesting; the value of H_{r,c} is 1/(r+c-1). We show how to make this matrix in the data step...
Read more »

R Continues Its Rapid Growth

April 7, 2014
By
R Continues Its Rapid Growth

This post was kindly contributed by r4stats.com » SAS - go there to comment and to read the full post. I’ve just updated the section below from The Popularity of Data Analysis Software. Note that the overall article is still under construction and all...
Read more »

10 popular Linux commands for Hadoop

April 6, 2014
By

This post was kindly contributed by DATA ANALYSIS - go there to comment and to read the full post. The Hadoop system has its unique shell language, which is called FS. Comparing with the common Bash shell within the Linux ecosystem, the FS shell has...
Read more »

Proc-x is looking for sponsors!

Dear readers, proc-x is looking for sponsors who would be willing to support the site in exchange for banner ads in the right sidebar of the site. If you are interested, please e-mail me at: tal.galili@gma[email protected]

Welcome!

SAS-X.com offers news and tutorials about the various SAS® software packages, contributed by bloggers. You are welcome to subscribe to e-mail updates, or add your SAS-blog to the site.

SAS and all other SAS Institute Inc. product or service names are registered trademarks or trademarks of SAS Institute Inc. in the USA and other countries. ® indicates USA registration.