search for: uncomparable

Hello all and thanks in advance for any advice. I am very new to R and have searched my question but have not come up with anything quite like what I would like to do. My problem is: I have a data set for individuals (rows) and values for behaviours (columns). I would like to know the proportion of shared behaviours for all possible pairs of individuals. The sum of shared behaviours divided by

What is the best way to implement a ''Down for Maintenance'' page across your Rails app? Ideally I would like to have a button in my admin section that toggles the display of a ''currently under maintenance'' page to every public request to the app (possibly with some dynamic content like estimated down-time) except for: - - requests from a specified IP