Re: [R] coxph means not equal to means of model matrix

On 9/3/21 12:59 PM, Bond, Stephen wrote: > > I looked at the nocenter and it says (-1,0,1) values but it seems that any > three-level > factor is included in that (represented as 1,2,3 in R) . > A factor is turned into a set of 0/1 dummy variable, so the nocenter applies.� I will add more cla

Re: [R] coxph means not equal to means of model matrix

I looked at the nocenter and it says (-1,0,1) values but it seems that any three-level factor is included in that (represented as 1,2,3 in R) . Also, is the baseline curve now showing the reference level and not the fictional .428 sex? If I predict the risk for a new row, should I multiply the c

Re: [R] coxph means not equal to means of model matrix

See ?coxph, in particular the new "nocenter" option. Basically, the "mean" component is used to center later computations.� This can be critical for continuous variables, avoiding overflow in the exp function, but is not necessary for 0/1 covariates.�� The fact that the default survival curve

[R] coxph means not equal to means of model matrix

Hi, Please, help me understand what is happening with the means of a Cox model? I have: R version 4.0.2 (2020-06-22) -- "Taking Off Again" Copyright (C) 2020 The R Foundation for Statistical Computing Platform: x86_64-w64-mingw32/x64 (64-bit) getOption("contrasts") unordered ord