HP 10413 Datasheet download pdf (Page 108)

108

As they do, marks appear on all three, but ing or un- ing

any one does the same for all three.

Convenient screen keys provided

There are a number of very convenient extra buttons provided at the bottom

of the screen when entering sequences.

Two of these - and - are

available as soon as the cursor moves onto

the U(N) line (see right). Pressing either will

enter the appropriate text into the sequence

definition.

The rest become visible once you have begun

to enter the sequence definition.

For example, suppose we enter the Fibonacci sequence into U2 by defining

U2(N) as U2(N-1) + U2(N-2). Rather than having to type all of this we

can use the buttons provided, pressing:

then then + then then

This is a very convenient feature, and worth remembering. The result…

There is no mark next to the definition

yet, since the sequence is defined recursively

and no values have yet been given for U2(1)

and U2(2). Type in a value of 1 for both of

these and then press the NUM button to switch

to the NUM view.

As you can see in the screenshot right, the

NUM view shows the actual values in the

sequence as a table. If you move the highlight

into the U1 and U2 columns, you can press the

button and see the sequence rule. You

can experiment for yourself and see the result

of pressing the button (see next page for an example). The

button is also available as usual, but it is easier to use other methods.

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HP 10413 Datasheet Page 108