[R] sensuc function in rms package

Nathan Pace n.l.pace at utah.edu
Tue Feb 11 01:53:24 CET 2014

Hi All,

I¹m using the twang package to estimate ATE propensity scores. These are
being used (inverse probability weighting) in a Cox model estimated by cph
in the rms package with cluster(id) set. I set options to include a
datadist object before running cph.

I want to check for sensitivity to unmeasured covariables by using the
sensuc function in rms with the default arguments.

My syntax is sensuc(fit). The first variable in the right hand side of the
model formula is a binary factor.

The following error is returned:

Current odds ratio for x:u=1
Error in type == "right" : 'type' is missing

My sessionInfo() is:

R version 3.0.2 (2013-09-25)
Platform: x86_64-apple-darwin10.8.0 (64-bit)

[1] en_US.UTF-8/en_US.UTF-8/en_US.UTF-8/C/en_US.UTF-8/en_US.UTF-8

attached base packages:
 [1] grid      parallel  splines   stats     graphics  grDevices utils
datasets  methods   base

other attached packages:
 [1] rms_4.1-1           SparseM_1.03        Hmisc_3.14-0
Formula_1.1-1       twang_1.3-20        latticeExtra_0.6-26
RColorBrewer_1.0-5  xtable_1.7-1        survey_3.29-5       gbm_2.1
[11] lattice_0.20-24     survival_2.37-7     car_2.0-19

loaded via a namespace (and not attached):
[1] cluster_1.14.4 MASS_7.3-29    nnet_7.3-7     tools_3.0.2

I¹ve looked at the sensuc code.

I can¹t understand the error message.


Nathan Pace, MD, MStat
Department of Anesthesiology
University of Utah
n.l.pace at utah.edu

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