I am searching some help to download a package that is not on cran but on R-Forge. The name of the package is fMarkovSwitching, I tried different things and when i search on the internet I do not find information that can help me to do it.
Below you can see some examples of what i have already try.

I have a table where the first column consists of IDs of several individuals who were measured at different months and years. I need to know in which months and years each individual has been studied, and also extract the unique IDs. Could someone help me with this, as I haven’t been able to figure it out so far working in R?