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References: [ +from:simona.costanzo@ubs.com: 8 ]

Total 8 documents matching your query.

1. breusch-pagan/cook-weiseberg test (score: 1)
Author: <simona.costanzo@ubs.com>
Date: Thu, 9 Feb 2006 11:17:11 -0000
Dear all, Would anyone know if there is a function/library to compute the breusch-pagan/cook-weiseberg test for heteroscedasticity? Many thanks! Simona Visit our website at http://www.ubs.com This me
/archives/html/s-news/2006-02/msg00021.html (7,831 bytes)

2. subscripting factors (score: 1)
Author: <simona.costanzo@ubs.com>
Date: Thu, 8 Sep 2005 09:22:33 +0100
in a data.frame of the form X1 X2 1 A 1 2 A 2 3 B 3 4 C 4 I would like to extract elements of X2, with X1="A". Where X1 is a factor and X2 is a numeric vector. Your help is very much appreciated Tha
/archives/html/s-news/2005-09/msg00020.html (7,780 bytes)

3. FW: subscripting factors (score: 1)
Author: <simona.costanzo@ubs.com>
Date: Thu, 8 Sep 2005 09:40:21 +0100
Thanks to all who respoded so promptly. I received similar answers... here is one of them Simona, If your data frame is named DF then DF$X2[DF$X1=="A"] Dimitrios Chalvatzis Risk Analyst Energy Wholes
/archives/html/s-news/2005-09/msg00021.html (11,106 bytes)

4. report file... (score: 1)
Author: <simona.costanzo@ubs.com>
Date: Mon, 28 Jul 2003 11:08:05 +0100
l
/archives/html/s-news/2003-07/msg00188.html (7,554 bytes)

5. Cor.test function (score: 1)
Author: <simona.costanzo@ubs.com>
Date: Wed, 3 Jan 2007 11:50:10 -0000
Dear all, I am calculating kendall's tau coefficients using the cor.test function and Splus 6.2. I am encountering the following problems: 1. the correlation coefficient is different from the one obt
/archives/html/s-news/2007-01/msg00003.html (8,968 bytes)

6. Kendall tau-b (score: 1)
Author: <simona.costanzo@ubs.com>
Date: Mon, 7 Sep 2009 11:24:00 +0100
Hi All, Could anyone please point me to some code in Splus for kendall tau-b, that is kendall tau including correction for ties. (The function cor.test in Splus does not correct for ties). Many thank
/archives/html/s-news/2009-09/msg00004.html (9,291 bytes)

7. Re: Kendall tau-b (score: 1)
Author: <simona.costanzo@ubs.com>
Date: Mon, 7 Sep 2009 16:50:46 +0100
Many Thanks Ronald, Possibly it does include some type of correction, but I am unsure of the formulation. It is not tau-b, I have compared calcualtion of Tau with SAS, R and Stata, and results are no
/archives/html/s-news/2009-09/msg00006.html (10,571 bytes)

8. Re: Kendall tau-b (score: 1)
Author: <simona.costanzo@ubs.com>
Date: Mon, 28 Sep 2009 17:53:41 +0100
Many thanks for your contributions. In summary we found that cor.test() calculates tau ignoring ties, but corrects the p-values. However, unfortunately I am not completely done. I am still looking f
/archives/html/s-news/2009-09/msg00038.html (12,057 bytes)

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