Displaying 4 results from an estimated 4 matches for "msel".
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isel
2013 Mar 19
1
How to automate this model selection algorithm?
I've got a complicated semi-parametric model that I'm fitting with
mgcv. I start with a model based on theory. Its got lots of
interaction terms. I want to winnow it down: removing each interaction
term or un-interacted main effect one by one, checking the AIC, and
retaining the model that gives me the lowest AIC. I then want to repeat
the procedure on the retained model.
Here is
2012 Jun 03
2
a question about subsetting
...39;s been a quite rewarding process so far, and I thank you all R gurus for all your generous help!
That being said, my question is about applying a model or an analysis to different groups based on a grouping variable. Below is the first six rows of my data:
ID Group1 Group2 Mem Gen Chance MSELGM MSELVR MSELFM MSELRL MSELEL ADOS Age
1 1 1 1 75 50.0 50 53 52 62 57 56 3 25
2 2 1 1 75 12.5 50 46 48 47 52 55...
2025 Jan 16
2
Weird and changed as.roman() behavior
..."MMMM"
is a pretty unique representation of 4000.
Also, one piece of other software (online)
https://www.rapidtables.com/convert/number/date-to-roman-numerals.html
does convert _dates_ up to the year 4999, see,
https://www.rapidtables.com/convert/number/date-to-roman-numerals.html?msel=January&dsel=1&year=4999&fmtsel=MM.DD.YYYY
giving MMMMCMXCIX for 4999.
Hence, I also think we should enlarge the valid range from current
{1 .. 3999} to
{1 .. 4999}
Martin
2025 Jan 15
1
Weird and changed as.roman() behavior
Well, the real issue then seems to be that .roman2numeric uses an invalid regular expression:
>> grepl("^M{,3}D?C{,4}L?X{,4}V?I{,4}$", cc)
> [1] TRUE TRUE TRUE TRUE TRUE
or
>> grepl("^I{,2}$", c("II", "III", "IIII"))
> [1] TRUE TRUE FALSE
Both the TRE and the PCRE specification only allow repetition quantifiers of the