Plotting Graphs - QuickPad PRO User Manual

Assign variables – A variable can be specified by setting a definition equal to it in the
COMMAND box and pressing .
ENTER
• Example: If you type "X=5" and press
program is ended or the variable is redefined.
• Notes on Variables:
o All variables must begin with a letter.
o Variables do not have to be defined before using.
o If a variable is not declared before it is used, the default setting of the variable
will be equal to zero.
Use predefined constants – , and are predefined by default and cannot be assigned
PI E R
new values. You can use these constants in the same way you would use variables.
•
= 3.1415926535897932385
PI
•
= 2.7182818184590453254
E
•
= the value of the previous result
R
Use memory variables – On the right side of the calculator screen are four memory
–
variables (mem1 mem4). The only differences between these variables and other
undefined variables is that these will remain displayed for easy recall, and will not be
erased when the program is ended. You can assign the memory variables just as you
would other variables.
• Example: If you type "mem1=1203" and press
be 1203 until the variable is redefined.
Write multiple expressions on one line – You can use the semi-colon to enter more than
one item per line.
• Example: If you type "x=10;y=2;x*y" and press
value of 10 to , the value of 2 to
X Y
result of 20.
• NOTE: You cannot put two different calculations on one line (i.e. 4+7;6*19). In this
case, the calculator will look at the last expression and disregard any other
calculations before it.
Use special functions – To use the special functions (for example, sin, sqrt, and so on),
type the function and the number separated by a space.
• Example: If you type "sin 45" and press
the result box.
18
, the letter x will represent 5 until the
ENTER
, then the value for
ENTER MEM
, the calculator will assign the
ENTER
, and will then calculate 10 times 2 to give the
, 0.85 (the sine of 45) will appear in
ENTER
1 will

3.2.3. Plotting Graphs

QuickPAD QuickKEYS
[ALT + V]
View menu
[ALT + O] Options menu
[ALT + Z]
Zoom menu
[ALT +H]
Help menu
[F1]
Help
[F2]
Clear graph
[F3]
Reset graph
[F4]
Shortcut key-mappings
[F5]
Settings
[F9]
Show command box
[F10] Hide command box
[CTRL – L]
Scroll left
[CTRL – R] Scroll right
[CTRL – U]
Scroll right
[CTRL – D]
Scroll down
[CTRL – Z]
Zoom in
[CTRL – S]
Zoom out (shrink)
How To
Adjust graph settings – The settings screen can be accessed from the options menu or
by pressing 5 at any time. Once inside the settings screen, you can specify vertical and
F
horizontal attributes, maximum and minimum points, and the actual size and look of the
coordinate grid. Use the key to toggle between setting boxes. When you are finished
TAB
adjusting the settings, press to return to the graph screen.
ENTER
• Xmin – smallest number on the x-axis
• Ymin – smallest number on the y-axis
• Xmax – largest number on the x-axis
• Ymax – largest number on the y-axis
• Xstep – distance between vertical grid lines
• Ystep – distance between horizontal grid lines
• Show grid – coordinate grid on/off
• Abort plot on esc – ???
• Pixel x – width of graph
• Pixel y – height of graph
Graph an equation – Enter the right side of an equation in the command box located at
the bottom of the graphing screen. Do not use spaces between numbers and symbols.
When you have finished keying in the equation, press
• Example: y = 4x^2+18
19
to plot the graph.
ENTER
, .
ENTER