Knowledge Base

Solution 11593: Defining a Function from a Program Prompt on the TI-89 Family, TI-92 Family, and Voyage™ 200 Graphing Calculators.

How do I define a function from a program prompt on a TI-89 family, TI-92 family, and Voyage 200 graphing calculator?

To define a function from a program prompt, convert the function contents to a string (if it is not already) and use the expr() function: expr("function string"&"store f(x)")

Example:

...
inputStr "input function", var1
expr(var1&"® y1(x)")
...

Note: To input "quotation marks", press [2nd] [1]. To input the "®" symbol, press the [STO>] key. To input the "&" symbol, press [2nd] [CHAR] [3] [6].

Please see the TI-89 family, TI-92 family and Voyage 200 guidebooks for additional information.