Maintenance script: Initial automated import

2016-02-24T18:27:16Z

Initial automated import

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{{Template:TI-BASIC:Command
|picture=FUNC.GIF
|summary=Enables function graphing mode.
|syntax=Func
|location=While editing a program, press:
# MODE to access the mode menu.
# Use arrows to select Func.
|compatibility=TI-83/84/+/SE
|size=1 byte
}}

The Func command enables [[TI-BASIC:Graphing_Mode#function|function]] graphing mode. This is usually unnecessary in a program, but if you want to graph a Y# equation, you'd want to make sure the calculator is in function mode first.

In function mode, you can graph equations where y (the vertical coordinate) is a function of x (the horizontal coordinate). This mode is most commonly discussed in algebra and single-variable calculus courses. Many curves, such as a parabola, have simple expressions when written in the form y=f(x).

However, in function mode, many expressions cannot be graphed at all. For example, a circle can't be easily graphed in function mode, since for some x-values, there are two y-values. Using two functions, you can achieve a circle, but it will still require a friendly graphing window to display perfectly.

Many calculator features are specifically targeted at function mode graphing. For example, two graphing styles (see [[TI-BASIC:Graphstyle|GraphStyle(]]) can be only used with function mode. The [[TI-BASIC:Drawf|DrawF]] command draws a function in graphing mode.

= Advanced Uses =

The [[TI-BASIC:System_Variables#window|window variables]] that apply to function mode are:

* '''Xmin''' -- Determines the minimum X-value shown on the screen.
* '''Xmax''' -- Determines the maximum X-value shown on the screen.
* '''Xscl''' -- Determines the horizontal space between marks on the X-axis in [[TI-BASIC:Axeson|AxesOn]] mode or dots in [[TI-BASIC:Gridon|GridOn]] mode.
* '''Ymin''' -- Determines the minimum Y-value shown on the screen.
* '''Ymax''' -- Determines the maximum Y-value shown on the screen.
* '''Yscl''' -- Determines the vertical space between marks on the Y-axis in [[TI-BASIC:Axeson|AxesOn]] mode or dots in [[TI-BASIC:Gridon|GridOn]] mode.
* '''Xres''' -- Determines the pixel distance between points used for graphing. This is a value 1-8: 1 for best quality, 8 for best speed.

= Related Commands =

* [[TI-BASIC:Param|Param]]
* [[TI-BASIC:Polar_Mode|Polar]]
* [[TI-BASIC:Seq_Mode|Seq]][[Category:TI-BASIC]]
[[Category:TIBD]]

TI-BASIC:Func - Revision history

Maintenance script: Initial automated import