Download and install MARK, R and RMark on your PC (or Mac if you swing that way)
Here are some capture-mark-recapture data in csv format. The data contain capture histories over 5 occasions, with 3 groups (area A, area B and area C). Assume that these are closed capture data
Read the data into an R data frame
Format the data for input into RMark and run at least one model
Reformat the data for MARK