search for: obsts

...2007' and 'Apr 1, 2007') group by id,tshour order by id,tshour; I've pulled data from PostgreSQL into R, and have a dataframe containing a timestamp column, v, and o (both numeric). I created an grouping index for every 5 minutes along these lines: obsfivemin <- trunc(obsts,units="hours") +( floor( (obsts$min / 5 ) ) * 5 * 60 ) (where obsts is the sql timestamp converted into a DateTime object) Then I tried aggregate(df,by=obsfivemin,cor), but that seemed to pass just a single column at a time to cor, not the entire data frame. It worke...

I'm trying to do a Hosmer-Lemeshow 'goodness of fit' test on my logistic regression model. I found some code here: http://sas-and-r.blogspot.com/2010/09/example-87-hosmer-and-lemeshow-goodness.html The R code is above is a little complicated for me but I'm having trouble with my answer: Hosmer-Lemeshow: p=0.6163585 le Cessie and Houwelingen test (Design library): p=0.2843620