create virtual patient data set

Question

I would like to create a virtual patient data set in R , where in I would like to have the following time points TIME = seq(1, 10, 1), be repeated for 3 unique patient IDs

Bjørn Kallerud · Accepted Answer · 2019-12-09T22:16:12.943

0

Thanks to the comment from @markus, you can use expand.grid:

df <- expand.grid(TIME = 1:10, ID = 1:3)

edited Dec 09 '19 at 22:16

answered Dec 09 '19 at 22:11

Bjørn Kallerud

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I think OP is looking for `expand.grid(1:10, 1:3)` – markus Dec 09 '19 at 22:12
Thanks @markus I have updated my answer. – Bjørn Kallerud Dec 09 '19 at 22:16
thank you so much @markus and bjornkallerud – abc Dec 09 '19 at 22:28
how about the AMT column though ? how to add the AMT such that it appears only during the first time point for each ID? – abc Dec 09 '19 at 22:30
@abc Try `df$AMT <- ifelse(df$TIME == 1, 10L, NA_integer_)` – markus Dec 10 '19 at 07:48

create virtual patient data set

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