Keystroke Differences Between TI-84 Plus Keystroke Differences Between TI-84 Plus Keystroke Differences Between TI-84 Plus and TI-82
and TI-82 and TI-82 and TI-82
Sequence Keystroke Changes Sequence Keystroke ChangesSequence Keystroke Changes Sequence Keystroke Changes
Refer to the table if you are familiar with the TI-82. It compares TI-84 Plus sequence-name syntax and variable syntax with TI-82 sequence-sequence-name syntax and variable syntax.
v(n) Vn
TI-84 Plus / TI-82 On TI-84 Plus, press: On TI-82, press:
n / n „ yô
u(n) / Un y [u]
£ „ ¤ y ó ¶¦À
TI-84 Plus TI-82
Chapter 6: Sequence Graphing 174
v(n) / Vn y [v]
£ „ ¤ y ó ¶¦Á
w(n) y [w]
£ „ ¤
not available
u(nN1) / UnN1 y [u]
£ „ ¹ À ¤ y õ
v(nN1) / VnN1 y [v]
£ „ ¹ À ¤ y ö
w(nN1) y [w]
£ „ ¹ À ¤
not available TI-84 Plus / TI-82 On TI-84 Plus, press: On TI-82, press:
Chapter 7: Tables 175
Chapter 7:
Chapter 7: Chapter 7:
Chapter 7:
Tables Tables Tables Tables
Getting Started: Roots of a Function Getting Started: Roots of a Function Getting Started: Roots of a Function Getting Started: Roots of a Function
Getting Started is a fast-paced introduction. Read the chapter for details.
Evaluate the function Y = X3 N 2X at each integer between L10 and 10. How many sign changes occur, and at what X values?
1. Press z † † † Í to set Func graphing mode.
2. Press o. Press „ 3 to select3. Then press ¹ 2 „ to enter the function Y1=X3N2X.
3. Press y - to display the TABLE SETUP screen. Press Ì 10 Í to set TblStart=L10. Press 1 Í to set @Tbl=1.
Chapter 7: Tables 176
Setting Up the Table Setting Up the Table Setting Up the Table Setting Up the Table
TABLE SETUP Screen TABLE SETUP ScreenTABLE SETUP Screen TABLE SETUP Screen
To display the TABLE SETUP screen, press y -.
Press Í to select Indpnt: Auto (automatically generated independent values). Press † Í to select Depend: Auto (automatically generated dependent values).
4. Press y 0 to display the table screen.
5. Press † until you see the sign changes in the value of Y1. How many sign changes occur, and at what X values?
Chapter 7: Tables 177 TblStart,
TblStart, TblStart, TblStart, @TblTblTblTbl
TblStart (table start) defines the initial value for the independent variable. TblStart applies only when the independent variable is generated automatically (when Indpnt: Auto is selected).
@Tbl (table step) defines the increment for the independent variable.
Note: In Seq mode, both TblStart and @Tbl must be integers.
Indpnt: Auto, Indpnt: Ask, Depend: Auto, Depend: Ask Indpnt: Auto, Indpnt: Ask, Depend: Auto, Depend: AskIndpnt: Auto, Indpnt: Ask, Depend: Auto, Depend: Ask Indpnt: Auto, Indpnt: Ask, Depend: Auto, Depend: Ask
Selections Table Characteristics Indpnt: Auto
Depend: Auto
Values are displayed automatically in both the independent-variable column and in all dependent-independent-variable columns.
Indpnt: Ask Depend: Auto
The table is empty; when you enter a value for the independent variable, all corresponding dependent-variable values are calculated and displayed automatically.
Indpnt: Auto Depend: Ask
Values are displayed automatically for the independent variable;
to generate a value for a dependent variable, move the cursor to that cell and press Í.
Indpnt: Ask Depend: Ask
The table is empty; enter values for the independent variable; to generate a value for a dependent variable, move the cursor to that cell and press Í.
Chapter 7: Tables 178 Setting Up the Table from the Home Screen or a Program
Setting Up the Table from the Home Screen or a ProgramSetting Up the Table from the Home Screen or a Program Setting Up the Table from the Home Screen or a Program
To store a value to TblStart, @Tbl, or TbYZnput from the home screen or a program, select the variable name from the VARS TABLE secondary menu. TblZnput is a list of
independent-variable values in the current table.
When you press y - in the program editor, you can select IndpntAuto, IndpntAsk, DependAuto, and DependAsk.
Defining the Dependent Variables Defining the Dependent Variables Defining the Dependent Variables Defining the Dependent Variables
Defining Dependent Variables from the Y= Editor Defining Dependent Variables from the Y= EditorDefining Dependent Variables from the Y= Editor Defining Dependent Variables from the Y= Editor
In the Y= editor, enter the functions that define the dependent variables. Only functions that are selected in the Y= editor are displayed in the table. The current graphing mode is used. In Par mode, you must define both components of each parametric equation (Chapter 4).
Editing Dependent Variables from the Table Editor Editing Dependent Variables from the Table EditorEditing Dependent Variables from the Table Editor Editing Dependent Variables from the Table Editor
To edit a selected Y= function from the table editor, follow these steps.
1. Press y 0 to display the table, then press ~ or | to move the cursor to a dependent-variable column.
2. Press } until the cursor is on the function name at the top of the column. The function is displayed on the bottom line.
Chapter 7: Tables 179 3. Press Í. The cursor moves to the bottom line. Edit the function.
4. Press Í or †. The new values are calculated. The table and the Y= function are updated automatically.
Note: You also can use this feature to view the function that defines a dependent variable without having to leave the table.
Chapter 7: Tables 180
Displaying the Table Displaying the Table Displaying the Table Displaying the Table
The Table The TableThe Table The Table
To display the table, press y 0.
Note: The table abbreviates the values, if necessary.
Independent and Dependent Variables Independent and Dependent VariablesIndependent and Dependent Variables Independent and Dependent Variables
The current graphing mode determines which independent and dependent variables are displayed in the table (Chapter 1). In the table above, for example, the independent
Current cell
Current cell’s full value
Dependent-variable values in the second and third columns Independent-variable
values in the first column
Chapter 7: Tables 181 variable X and the dependent variables Y1 and Y2 are displayed because Func graphing mode is set.
Clearing the Table from the Home Screen or a Program Clearing the Table from the Home Screen or a ProgramClearing the Table from the Home Screen or a Program Clearing the Table from the Home Screen or a Program
From the home screen, select the ClrTable instruction from the CATALOG. To clear the table, press Í.
From a program, select 9:ClrTable from the PRGM I/O menu or from the CATALOG. The table is cleared upon execution. If IndpntAsk is selected, all independent and dependent variable values on the table are cleared. If DependAsk is selected, all dependent variable values on the table are cleared.
Scrolling Independent-Variable Values Scrolling Independent-Variable ValuesScrolling Independent-Variable Values Scrolling Independent-Variable Values
If Indpnt: Auto is selected, you can press } and † in the independent-variable column to display more values. As you scroll the column, the corresponding dependent-variable Graphing Mode
Independent Variable
Dependent Variable
Func (function) X Y1 through Y9, and Y0
Par (parametric) T X1T/Y1T through X6T/Y6T
Pol (polar) q r1 through r6
Seq (sequence) n u(n), v(n), and w(n)
Chapter 7: Tables 182 values also are displayed. All dependent-variable values may not be displayed if Depend: Ask is selected.
Note: You can scroll back from the value entered for TblStart. As you scroll, TblStart is updated automatically to the value shown on the top line of the table. In the example above, TblStart=0 and @Tbl=1 generates and displays values of X=0,…,6; but you can press } to scroll back and display the table for X=M1,…,5.
Displaying Other Dependent Variables Displaying Other Dependent VariablesDisplaying Other Dependent Variables Displaying Other Dependent Variables
If you have defined more than two dependent variables, the first two selected Y=
functions are displayed initially. Press ~ or | to display dependent variables defined by other selected Y= functions. The independent variable always remains in the left column, except during a trace with Par graphing mode and G-T split-screen mode set.
Chapter 7: Tables 183 Note: To simultaneously display two dependent variables on the table that are not defined as consecutive Y= functions, go to the Y= editor and deselect the Y= functions between the two you want to display. For example, to simultaneously display Y4 and Y7 on the table, go to the Y= editor and deselect Y5 and Y6.
Chapter 8: Draw Instructions 184