Displaying 2 results from an estimated 2 matches for "totalut".
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totalt
2009 Aug 19
2
Problem with predict.coxph
...The model runs fine.
Then we create some new data that is all combinations of Price and Product and retrieve the summary linear predictors.
newdata=expand.grid(Price=factor(as.character(1:5)),Product=factor(as.character(1:5)))
## create a utility matrix for all combinations of prices and products
totalut<-predict(mod1,newdata=newdata,type="lp")
Under R 2.7.1 this produces the following output:
> totalut
[,1]
1 0.01534582
2 -0.07628528
3 -0.88085189
4 -1.19458045
5 -1.03579684
6 0.40065672
7 0.15922492
8 -0.49233524
9 -0.65483441
10 -1.07739920
11 0.27589201...
2009 Apr 27
2
Problem with R 2.9.0 vs. R2.8.1 with either "survival" package or "predict" function
Just wanted to alert everyone regarding a problem that I only
experience with R2.9.0 and not with R2.8.1 when I run both using
exactly the same script and the same data.
Here is what I do with my data "MyData", 2 predictors (V1 and V2) and
my survival DV "Depvar":
library(survival)