search for: cantebury

Displaying 3 results from an estimated 3 matches for "cantebury".

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2005 Oct 31
3
Still a bug with NA in sd() or var()?
...Am I missing something, or is this a problem with sd()? Why does mean(x) give a simple NA, but var(x) requires some additional work? There was some previous discussion in r-help about this for R v 1.6.0, with mention of a fix for 1.6.1. Dr Roger Dungan School of Biological Sciences University of Cantebury Christchurch, New Zealand ph +64 3 366 7001 ext. 4848 fax +64 3 364 2590
2005 Feb 24
2
survreg with gamma distribution: re-post
...mentioned using survreg.distributions to customise a gamma distribution, but I can't figure out how to make this work with the resources (intellectual and bibliographical!) that I have available. With thanks in advance for your help, Dr Roger Dungan School of Biological Sciences University of Cantebury Christchurch, New Zealand ph +64 3 366 7001 ext. 4848 fax +64 3 354 2590
2005 Jan 27
0
Survreg with gamma distribution
...mentioned using survreg.distributions to customise a gamma distribution, but I can't figure out how to make this work with the resources (intellectual and bibliographical!) that I have available. With thanks in advance for your help, Dr Roger Dungan School of Biological Sciences University of Cantebury Christchurch, New Zealand ph +64 3 366 7001 ext. 4848 fax +64 3 354 2590