Skip to content
Prev 304809 / 398503 Next

Create a function to number each repeated visit or measurements

Nordlund, Dan (DSHS/RDA) 
Your email was scrambled and therefore difficult to decipher.  However, using the plyr package, you could do something like

library(plyr)
ddply(your_data_frame,"AreaID",transform,visit=0:(length(AreaID)-1))


Hope this is helpful,

Dan

Daniel J. Nordlund
Washington State Department of Social and Health Services
Planning, Performance, and Accountability
Research and Data Analysis Division
Olympia, WA 98504-5204

Thread (6 messages)

Jon Toledo Create a function to number each repeated visit or measurements Sep 3 PIKAL Petr Create a function to number each repeated visit or measurements Sep 4 arun Create a function to number each repeated visit or measurements Sep 4 Jon Toledo Create a function to number each repeated visit or measurements Sep 4 William Dunlap Create a function to number each repeated visit or measurements Sep 4 Nordlund, Dan (DSHS/RDA) Create a function to number each repeated visit or measurements Sep 4