Calculator User Manual

ManualsBrandsTexas Instruments ManualsCalculatorPLUS TI-92

211

212

213

214

215

216

217

218

219

220

Chapter 12: Additional Graphing Topics 203

12ADDLGR.DOC TI-89/TI-92 Plus: Additional Graphing Tools (English) Susan Gullord Revised: 02/23/01 1:03 PM Printed: 02/23/01 2:15 PM Page 203 of 20

1. Display the graph. (This example shows

y1(x)=5

cos(x)

2. Display the coordinates or math results you want to collect.

3. Save the information to the Home screen or the

sysData

variable.

89:

(Home screen) or

(sysData

variable)

92 Plus:

(Home screen) or ¥

D (sysData

variable)

4. Repeat the process as necessary.

Displayed coordinates are added to

the Home screen’s history area

(but not the entry line) as a

single-row matrix or vector.

Displayed coordinates are stored in a

data variable named sysData,

which you can open in the

Data/Matrix Editor.

¦ When you press:

89:

92 Plus:

− If

sysData

does not exist, it is created in the

MAIN

folder.

− If

sysData

already exists, new data is appended to the end of

any existing data. Existing titles or column headers (for the

affected columns) are cleared; titles are replaced with the

applicable titles for the new data.

¦ The

sysData

variable can be cleared, deleted, etc., just as any

other data variable. However, it cannot be locked.

¦ If the Graph screen contains a function or stat plot that

references the current contents of

sysData

, this command will not

operate.

Collecting Data Points from a Graph

From the Graph screen, you can store sets of coordinate

values and/or math results for later analysis. You can store the

information as a single-row matrix (vector) on the Home

screen or as data points in a system data variable that can be

opened in the Data/Matrix Editor.

Collecting the

Points

Tip: To display coordinates

or math results, trace a

function with

…

or perform

‡

Math

operation (such

as Minimum or Maximum).

You can also use the free-

moving cursor.

Tip: Use a split screen to

show a graph and the Home

screen or Data/Matrix Editor

at the same time.

Notes about

SysData Variable

TI-89:

TI-92 Plus:

TI-89:

TI-92 Plus: