Calculate Expressions - QuickPad PRO User Manual

• Notes on graphing:
o No variables can be used in an equation except for
o Special functions such as sine and log are supported. (Refer to section 3.2.2
for complete description of special functions)
Change the graph view – The default settings place the center of the graph in the middle
of the screen with the command box and coordinate grid showing. These settings can be
changed in several ways.
• Zoom in/out – Use quick keys to enlarge and shrink the viewable graph area
o [CTRL + Z] – Zoom in
o [CTRL + S] – Zoom out (shrink)
• Move – Use quick keys to move the graph view up, down, left or right
o [CTRL + L] – Scroll left
o [CTRL + R] – Scroll right
o [CTRL + U] – Scroll up
o [CTRL + D] – Scroll down
•
Hide command box – Use quick keys to remove or replace the command box in the
viewable screen.
o [F9] – Show command box
o [F10] – Hide command box
• Hide grid – Remove the grid lines from the graph by accessing the graph settings
screen ( 5).
F
• Note: If graphed equations are already on the screen when a viewing feature is
selected, the program must re-graph the equations under the new view. The more
graphs there are, the longer the program will need to re-draw them.
3.3. S
PREADSHEET
The QuickPAD Pro Spreadsheet functions much like a spreadsheet program on a standard
PC. You can use text strings and numeric strings to create a wide variety of files
including financial calculators, data lists, mathematical models and so on. The primary
limit to the size and complexity of the spreadsheet is the actual memory being used. Of
course, with external memory cards the potential size of a file is practically unlimited.
3.3.1. Getting Started
The start-up screen for the spreadsheet is identical to that of the word processor. Simply
select a saved file from the box at the left or create a new file by pressing
you wish to access is on another drive, attach the drive (flash card) to the QuickPAD Pro
and press to access the external files. When a new file is selected, you will be prompted
X
to enter a file name for your new spreadsheet. Type the desired name for the new file and
to begin working. The file will automatically be saved as an '.sc' file by
press
ENTER
default and will be immediately accessible in the "...\SPSHEET" folder.
20
.
X
. If the file
N

3.2.2. Calculate Expressions

Operation Symbols and Special Functions
OPERATION AND EQUATION SYMBOLS
[ + ] Add
[ - ] Subtract
[ * ] Multiply
[ / ] Divide
[ ; ] Enter multiple expressions on a line
[ % ]
Divides operand by 100
[F2]
Clear
SPECIAL FUNCTIONS
sin
Sine
cos
Cosine
Tan
Tangent
asin
Arc sine
acos
Arc cosine
atan
Arc tangent
log
Logarithm
log10 Logarithm base 10
exp Exponential
sqrt Square root
abs Absolute Value
How To
Adjust calculator settings – From the calculator main menu, press
You will be given a choice of either calculator settings or graph settings. Choose the first
option by pressing . There are two settings you can now adjust: precision and mode.
C
"Precision" refers to the number of digits that will be displayed after a decimal point
when rounding an answer. Use the key to switch between fields and enter your
TAB
desired settings. "Mode" refers to either radians or degrees.
Calculate a basic expression without variables – In the COMMAND box, enter the
function to be calculated (without spaces), and press the
appear in the RESULT box at the bottom of the screen.
• Example: If you type, "13+6+18+1" and press
four numbers and place the result, "38" in the RESULT box.
Use the result in the next equation – The result appearing in the RESULT box is
automatically assigned the variable . Therefore, if you want to use this number in the
R
next equation, simply type in the equation you want to calculate.
R
• Example: Continuing from the previous example, if you then type "r*2" in the
COMMAND box and press , the calculator will display "76" in the RESULT
ENTER
box (38x2). The new value of is now 76.
R
17
to select (S)ettings.
S
key. The result will
ENTER
, the calculator will add those
ENTER