Texas Instruments TI-84 - Manual (Page 424)

Chapter 15: CATALOG, Strings, Hyperbolic Functions 421
sub( sub( sub( sub(
sub( returns a string that is a subset of an existing string . string can be a string or a string
variable. begin is the position number of the first character of the subset. length is the
number of characters in the subset.
sub(string,begin,length)
Entering a Function to Graph during Program Execution Entering a Function to Graph during Program Execution Entering a Function to Graph during Program Execution Entering a Function to Graph during Program Execution
In a program, you can enter a function to graph during program execution using these
commands.