User Guide

20050501
1-6-15
Input
k Using the 2D Keyboard
The 2D keyboard provides you with a number of templates that let you input fractions,
exponential values, nth roots, matrices, differentials, integrals, and other complex
expressions as they are written.
It also includes a V key set that you can use to input single-character variables like the
ones you can input with the math (mth) keyboard.
u Initial 2D keyboard key set
This key set lets you input mathematical expressions as they are written. Tap the J and K
keys to scroll between the menus of available templates.
K →
←
J
u V key set
Tapping the V key displays keys for inputting single-character variables, and changes the
V softkey to I. You can tap this key to toggle between V and the initial 2D keyboard.
Tapping the E key switches to a key set for inputting upper-case single-character
variables.
← E →
Tip
• As its name suggests, a single-character variable is a variable name that consists of a single
character like “a” or “x”. Each character you input on the V keyboard is treated as a single-
character variable. You cannot use the V keyboard to input multiple-character variable names
like “ab” or multiple-character strings. You must use the alphabet (abc) keyboard when you want
to input a multiple-character string. For more information, see “Using Single-character Variables”
on page 1-6-12.
• For information about the D key that appears in the lower right of all of the 2D keyboard key
sets, see “Using the Answer Variable (ans)” on page 2-2-2.
• Note that natural input is available in most applications of the ClassPad. Natural input cannot be
used in the geometry measurement box or when entering data into a list.