RStudio
In current releases of RStudio there is native
integration between Packrat and
RStudio projects which makes the management of dependecies with packrat
easier.
New Projects
When creating a new project in RStudio, a checkbox can be selected which states
Use packrat with this project, this will automatically initialise packrat in
the RStudio session and create the folder structure for packrat by default.
Existing Projects
If you wish to convert to using Packrat with a current project in RStudio, this is possible by using the file browser in RStudio to select the directory which contains the project and navigating to;
Settings > Tools > Project Options > Packrat > 'Use packrat with this project'
This will automatically install the current packages in the project into a packrat directory and enable usage of the UI to manage packages via Packrat.