1-6-15 Input

kUsing 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 Vkey 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 Vkey set

Tapping the Vkey displays keys for inputting single-character variables, and changes the

Vsoftkey to I.You can tap this key to toggle between Vand 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 Vkeyboard is treated as a single- character variable. You cannot use the Vkeyboard 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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