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Dear prof. Harrell,
I've recently learned of a way to work with time-dependent coefficients when the proportional hazards assumption is violated in the cox-regression: By splitting the dataset using …
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Let's say that some samples are grouped (patients in a hospital, etc.) and that these groupings induce correlations between the samples.
If I'm interested in understanding the effect of treatment …
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Hello, Langzeng, I am very interested in your tdCoxSNN. There is a time-dependent in the naming of this model. I want to ask where this time-dependent is reflected? I look forward to your reply!
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There seem to be differences in how R and Stata handle failure times equal to zero (or more generally, failure times equal to entry times). We currently agree with R (at least in the failure time == …
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To provide one way for users who definitely want overparametrized dummy coding to just do
```
C(myfactor, DummyDammit)
```
or whatever.
[Request from Josef, talked over at PyCon]
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Hello,
I am experiencing an issue with the `Scissor` function in Seurat while analyzing single-cell RNA-seq data. I am trying to integrate my Seurat object with Scissor for further analysis, but I …
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**Major Features**
+ Extend IHT to Cox model.
+ Re-enable GPU computing as once provided by @klkeys.
+ Add option to possibly constrain IHT estimates to specified upper and lower bounds
+ Provide …
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### What is your question?
1. In trying to reproduce the estimates produced by the examples for `summarize_coxph()` in [Cox proportional hazards regression](https://insightsengineering.github.io/te…
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Dear Professor Frank,
I am trying to run survfit using cph object according to the syntax mentioned here: https://www.rdocumentation.org/packages/rms/versions/5.1-1/topics/survfit.cph
My data is…