20021201
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,
n
th 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.
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