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(20 Apr 2011,
FrankHarrell
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Data Manipulation and Stratification in R: Examples and Tricks
Preparing Data for Analysis
R requivalent to SAS for
transposing and reshaping datasets
A great
http://r.789695.n4.nabble.com/Can-R-replicate-this-data-manipulation-in-SAS-td3463880.html example
of using the
reshape
package to re-write a SAS program
Stratified Analyses
Conversion of SAS code to compute stratified mean, CV, standard error for two analysis variables
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Topic revision: r4 - 20 Apr 2011,
FrankHarrell
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