What Is a Slot?


A position in a group, series, sequence, or other arrangement. The term is also used to describe a position of employment or rank in an organization or hierarchy.

In casinos, a slot is an area on a machine that holds a reel or disc with symbols on it. A player inserts cash or, in “ticket-in, ticket-out” machines, a paper ticket with a barcode into the slot and presses a button to activate the machine, which then spins the reels and arranges the symbols according to the pay table. The player earns credits when the symbols line up on the pay line. Many machines also have special symbols that appear more frequently than others and can multiply a player’s winnings.

When a statistical slot is selected, the results for the expression and the data in all snapshots are plotted on the graph, with special ornamentation on the header to indicate its type (see Figure 6.18). The slot dialog also includes an option to plot only the expression. You can also configure the slot’s units and display format using the slot dialog.

A periodic slot with a Time Indexed period displays one value per row, which can be accessed from RPL by referring to the slot as an Interpolated Periodic Slot or a Regular Interval Periodic Slot. However, you can use the View menu to specify a different configuration for the slot’s Period and Interval settings. Note that a reference to a value at a timestep outside the range of the slot’s period will return NaN.