A list is an R-object that can have a wide range of different items inside of it, including vectors, functions, and even another list.
The head() function lets you display the first observations in a data frame. The method tail() prints the final observations in your data collection in a manner similar to that. Both head() and tail() print a top line called the 'header', which contains the names of the distinct variables in your data collection. The R language's transform() function is used to alter data. The first parameter is transformed into a data frame. A suitable variable name comprises of letters, numbers and the dot or underline characters. The variable name does not begin with a number but rather with a letter or a dot.
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When a formula contains the address of a cell, it is called a c<span>ell reference.
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I don’t understand how this question can u explains more or be a little more specific please.
1. The keyboard is an example of an input device.
2. A mouse is an example of an input device.
3. Display Monitors are examples of output devices as they display information.4. Audio speakers are examples of output devices.5. Headsets with microphones are an example of both an input and output device as they allow sound to be inputted and receive sound.6. Printer/Printer scanner. A printer would be an example of an output device, however, a printer scanner combination would be both input and output.