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From |
sarah smith <[email protected]> |

To |
[email protected] |

Subject |
st: comparing the values at different observations |

Date |
Sun, 17 Jul 2005 18:24:53 -0400 |

Dear STATA users, I wonder how I can compare the values of a variable, say var1, at different observations? (In particular I want to the regression below) while var1(at line 2) = var1(at line 10 ) { regress y x in 2/10 } Thanks for suggestions, Sarah On 7/17/05, Allan Garland <[email protected]> wrote: > Is there a relatively easy way to implement a hierarchical cluster > analysis in Stata 9 on the variables (not the observations), using a > different measure of distance between the variables? > > The "clv" program appears to use an approach to assessing the distances > similar to that of principal components. Using the built-in cluster > commands on the variables requires transposing the rows and columns of > the data. I looked at that routine and it wasn't simple enough (for me) > to see how to alter Jean-Benoit Hardouin's code to do this (I'm an > intermediate at program writing). > > In any case, what I want to implement in Stata is what Frank Harrell > describes in his textbook (FE Harrell Jr. (2001). Regression Modeling > Strategies. New York, Springer) where he promotes the value of doing HCA > (for data reduction) using as a measure of distance/similarity between > variables the Hoeffding's D (W Hoeffding. A Non-Parametric Test of > Independence. Annals of Mathematical Statistics 19(4):546-557, 1948). > I've written code that calculates the matrix of D's between all pairs of > variables, and am HOPING that someone can point me in the direction of > Stata programming code that will let me do something simple --- i.e. > just plug the matrix of D's in and thus obtain a HCA. > > Any ideas would be most welcome. > > Allan Garland > > > * > * For searches and help try: > * http://www.stata.com/support/faqs/res/findit.html > * http://www.stata.com/support/statalist/faq > * http://www.ats.ucla.edu/stat/stata/ > * * For searches and help try: * http://www.stata.com/support/faqs/res/findit.html * http://www.stata.com/support/statalist/faq * http://www.ats.ucla.edu/stat/stata/

**Follow-Ups**:**Re: st: comparing the values at different observations***From:*"Clive Nicholas" <[email protected]>

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