Comments (4)
Hi,
For better help could you give us an example as in tmerge example.
The pbc data set contains baseline data and follow-up status
# for a set of subjects with primary biliary cirrhosis, while the
# pbcseq data set contains repeated laboratory values for those
# subjects.
# The first data set contains data on 312 subjects in a clinical trial plus
# 106 that agreed to be followed off protocol, the second data set has data
# only on the trial subjects.
temp <- subset(pbc, id <= 312, select=c(id:sex, stage)) # baseline data
pbc2 <- tmerge(temp, temp, id=id, endpt = event(time, status))
pbc2 <- tmerge(pbc2, pbcseq, id=id, ascites = tdc(day, ascites),
bili = tdc(day, bili), albumin = tdc(day, albumin),
protime = tdc(day, protime), alk.phos = tdc(day, alk.phos))
fit <- coxph(Surv(tstart, tstop, endpt==2) ~ protime + log(bili), data=pbc2)
or
excluding tmerge functionalities, if you want to merge the two df you can use dplyr package:
data1<- data.frame(
id = c(1, 2, 3),
tstart = c(3, 2, 2),
tstop= c(4, 8, 6),
status = c(1, 0, 1),
measu1=c(54, 66, 18))
data2<- data.frame(
id = c(1, 2, 3),
measu2=c(66, 73, 82))
data1 |>
dplyr::left_join(data2, by= "id")
```
```
id tstart tstop status measu1 measu2
1 1 3 4 1 54 66
2 2 2 8 0 66 73
3 3 2 6 1 18 82
```
from snp_plotter.
I think you need to create an event before to merge datasets.
Make a sens to your event
data1<- data.frame(
id = c(1, 2, 3),
tstart = c(3, 2, 2),
tstop= c(4, 8, 6),
status = c(1, 0, 1),
measu1=c(54, 66, 18))
data2<- data.frame(
id = c(1, 2, 3),
tstart = c(3, 2, 2),
measu2=c(66, 73, 82))
data2 <- tmerge(data2, data2, id=id, endpt = event(tstart, measu2))
tmerge(data2, data1, id=id, tstop= tdc(endpt, tstop))
Error in tmerge(data2, data1, id = id, tstop = tdc(endpt, tstop)) :
tstart and tstop arguments only apply to the first call
from snp_plotter.
Many thanks for the answer, however, it is necessary to use the tmerge to do the Cox proportional hazard ratio regression repeating measurement.
Accordingly, should I put two intervals of time in each data? and if yes how can I merge it? and associated with each measurement?
I was thinking about formatting my data as follows;
id tstart tstop measurment status
1 1 0 3 54 1
2 1 3 4 66 1
3 2 0 2 66 0
4 2 2 8 73 0
BUT, can't figure out how to do it with tmerge again!!
IS
from snp_plotter.
In the tmerge function, the tstart and tstop variables can be present in the first dataset only.
from snp_plotter.
Related Issues (3)
Recommend Projects
-
React
A declarative, efficient, and flexible JavaScript library for building user interfaces.
-
Vue.js
🖖 Vue.js is a progressive, incrementally-adoptable JavaScript framework for building UI on the web.
-
Typescript
TypeScript is a superset of JavaScript that compiles to clean JavaScript output.
-
TensorFlow
An Open Source Machine Learning Framework for Everyone
-
Django
The Web framework for perfectionists with deadlines.
-
Laravel
A PHP framework for web artisans
-
D3
Bring data to life with SVG, Canvas and HTML. 📊📈🎉
-
Recommend Topics
-
javascript
JavaScript (JS) is a lightweight interpreted programming language with first-class functions.
-
web
Some thing interesting about web. New door for the world.
-
server
A server is a program made to process requests and deliver data to clients.
-
Machine learning
Machine learning is a way of modeling and interpreting data that allows a piece of software to respond intelligently.
-
Visualization
Some thing interesting about visualization, use data art
-
Game
Some thing interesting about game, make everyone happy.
Recommend Org
-
Facebook
We are working to build community through open source technology. NB: members must have two-factor auth.
-
Microsoft
Open source projects and samples from Microsoft.
-
Google
Google ❤️ Open Source for everyone.
-
Alibaba
Alibaba Open Source for everyone
-
D3
Data-Driven Documents codes.
-
Tencent
China tencent open source team.
from snp_plotter.