Tom questions

• How do I get R to spit out the critical value for F-statistic based on ANOVA?
• How do I get command-line Perl to accept shell variables?
• Why can't I reasign the "Undo" function as ctrl+y instead of ctrl+shift+z. Why can't I remove the default "yank" command
• What is a practical difference between check_call check_output call, and Popen methods in the subprocess module?

Tom answers