Displaying 5 results from an estimated 5 matches for "r2n".
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r2
2009 May 13
1
Nagelkerkes R2N
...4327419284829055 0.02377394454919647515 10
And my question ist about the R2: Why ist the value always 1.0. That doesn?t
seem to me like a realistic value.
And so I tried to calculate R2 with my own formula:
LR <- -2*cox$loglik[2]
L0 <- -2*cox$loglik[1]
n <- length(data[,"ID"])
R2N <- (1-exp(-LR/n)) / (1-exp(L0/n))
R2N calculated that way is -0.00132314024559236.
Can anybody help me to understand the formula to R2 and why the
validate-function results in 1.0?
Thanks,
Andrea.
2008 Oct 22
0
Calculate individual R2n values
Does anyone know an alternate way of calculating R2n with spatial data other
than converting values into ltraj format (adehabitat package)?
I have a series of geographic xy coordinates (in metres). I imagine I can
subtract x1y1 from x2y2 to get the spatial difference (dxdy), but what
function can I use to calculate R2n (i.e. net squared displacem...
2009 Jul 15
0
Nagelkerkes R2N
I am interested Andrea is whether you ever established why your R2 was 1.
I have had a similar situation previously.
My main issue though, which I'd be v grateful for advice on, is why I am obtaining such negative values -0.3 for Somers Dxy using validate.cph from the Design package given my value of Nagelkerke R2 is not so low 13.2%.
I have this output when fitting 6 variables all with
2009 Nov 22
0
Adding columns to lower level of list
...10 0 2003-08-03 23:33:00 2003-08-04 01:43:58
4 Abigail Abigail.4 43 0 2003-08-04 08:15:25 2003-08-04 18:59:58
5 Abigail Abigail.5 78 0 2003-08-05 00:44:19 2003-08-05 20:15:00
> head(cut.ltr[[1]])
x y date dx dy dist dt R2n abs.angle rel.angle
1 809189.8 2189722 2003-05-31 13:29:59 81.87136 315.3389 325.7937 901 0.0 1.316775 NA
2 809271.6 2190037 2003-05-31 13:45:00 13.00097 258.7351 259.0616 901 106141.5 1.520590 0.20381526
3 809284.6 2190296 2003-05-31 14:00:01 250.52656 669.2065 714.5634 8...
2009 Jul 23
1
[PATCH server] changes required for fedora rawhide inclusion.
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