Hi,
Im trying to set up a long format data structure to use xtgee models. For each time variable (week) there are three tilt levels. The other variables eg sbp are measured at each tilt level for each assessment week.
When I try to xtset with id week this is not allowed because of repeat weeks (one for each tilt level). I wish to assess time trends in measurements within id across weeks and assess changes within individuals based upon tilt.
Clearly I have set up an incorrect structure for xtset or this is not possible?
Here is an excerpt of the data structure
id week tilt sbp
1 20 10 119
1 20 15 114
1 20 0 117
1 30 15 .
1 30 0 121
1 30 10 113
2 20 0 .
2 20 15 93
2 20 10 106
2 30 15 123
2 30 0 123
any advice would be greatly appreciated
yours
Richard Hiscock
Related Posts with xtset with time variable and categorical variable
Date generation after reshaping the dataHello, This is monthly return data of various companies for year 1996. I am facing problem in gener…
Step function for combined line and stacked area plots for competing risks CI functions in stataHello, I need help figuring out how to implement step functions in both line and stacked area plots …
fitstatWhy the fitstat after mprobit in stata does not work? …
Cell Mean ImputationGood day all I am using a stacked cross-sectional dataset, called the South African Post-Apartheid …
univariate testHello everyone, I have a question about how to apply uni-variate test in stata. My model as follows:…
Subscribe to:
Post Comments (Atom)
0 Response to xtset with time variable and categorical variable
Post a Comment