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...
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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...
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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...
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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...
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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...
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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 ...
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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...
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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...
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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...
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