![]() ![]() Option-Command-P-R:Reset NVRAM or PRAM.If your Mac is using a firmware password, you're prompted to enter the password. Option (⌥) or Alt: Start up to Startup Manager, which allows you to choose other available startup disks or volumes.macOS Recovery installs different versions of macOS, depending on the key combination you use while starting up. Or use Option-Command-R or Shift-Option-Command-R to start up from macOS Recovery over the Internet. Command (⌘)-R: Start up from the built-in macOS Recovery system.Keep holding until the described behavior occurs. To use any of these key combinations, press and hold the keys immediately after pressing the power button to turn on your Mac, or after your Mac begins to restart. Use Finder keyboard shortcuts to display windows, copy and move files, and launch applications. The Mac OS X Lion Finder helps you access and organize most of the important Mac OS X functions while you work. Commands that refer to filenames, as most do, assume that you’re talking about files in the. If you’re working in Terminal on your Mac, you need to know the most important UNIX commands: those that work with directories, those that work with files, and miscellaneous but commonly used commands. X2 gives 5, xc(2,4) gives 5 9 for x as above matrix #fill in (by row) the. Sum(x), or help(hist) #select elements from a vector or list, e.g. X = c(3,5,8,9) or y = c(”Jack”,”Queen”,”King”) 1:19 #create a sequence of integers from 1 to 19 #give arguments to a function, e.g. Help #give help regarding a command, e.g.
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