| Property | Value |
|---|---|
| Hex Value | $EFA6 |
| Categories | |
| Localizations |
|
piecewise(
Overview
New piecewise function to support entry of functions as they are seen in textbook. This command can be found in » MATH B:piecewise(
Comment:CE OS 5.3+
Availability: Token available everywhere.
Syntax
piecewise(
Location
math
Description
The piecewise( command is a new addition in the release of OS 5.3 for the TI-84 Plus CE. As implied, it allows for the graphing of piecewise functions in the Y= editor. The example code demonstrates how this works from within a program.
:ClrDraw
:Input "Y1=",Str1
:Input "Y2=",Str2
:Str1→Y1
:Str2→Y2
:FnOff
:"piecewise(Y1,X≥0,Y2,X<0→Y3
:DispGraph
Advanced Uses
One use of the piecewise( function is to evaluate an expression for a given value of X. For example:
:piecewise(X²+2,X≥0
This code will return the value of the expression if X≥0. So if X=0, then the program will return a value of 2. If X=3, it will return a value of 11. If X=-5, it will return an error.
Optimization
This command can simplify and compact the usage of piecewise expressions in programs. If you have less than 6 conditions that will never overlap, and they all affect a single variable, you can use the piecewise( command to make your code smaller, as shown below. Beware of comparability, though.
:If X<2
:Then
:4.5X→N
:Else
:8X+3→N
:End
can be
:piecewise(4.5X,X<2,8X+3,X≥2→N
Error Conditions
- ERR:INVALID is thrown if expressions are not defined.
- ERR:DATA TYPE is thrown if a quotation mark is not placed before a piecewise command that is to be stored to an equation variable.
See Also
Source: parts of this page were written by the following TI|BD contributors: Battlesquid, iPhoenixOnTIBD, kg583, Myles_Zadok.
History
| Calculator | OS Version | Description |
|---|---|---|
| TI-84+CE | 5.3.0 | Added |
Created: February 23, 2023 23:15:01