©
National Instruments Corporation
12-1
12
Case and Sequence Structures
and the Formula Node
This chapter introduces the basic concepts of Case and Sequence structures
and the Formula Node, and provides activities that explain the following:
•
How to use the Case structure
•
How to use the Sequence structure
•
What sequence locals are and how to use them
•
What a Formula Node is and how to use it
Both Case and Sequence structures can have multiple subdiagrams,
configured like a deck of cards, of which only one is visible at a time.
At the top of each structure border is the subdiagram display window,
which contains a diagram identifier in the center and decrement and
increment buttons at each side. The diagram identifier indicates which
subdiagram currently is displayed. For Case structures, a diagram identifier
is a list of values which select the subdiagram. For Sequence structures, a
diagram identifier is the number of the frame in the sequence (0 to n – 1).
The following illustration shows a Case structure and a Sequence structure.
Clicking on the decrement (left) or increment (right) button displays the
previous or next subdiagram, respectively. Incrementing from the last
subdiagram displays the first subdiagram, and decrementing from the first
subdiagram displays the last. For more information about Case and
Sequence structures, refer to Chapter 19, Structures, in the G Programming
Reference Manual.
Case Structure
Sequence Structure
Increment/Decrement
Buttons
Diagram
Identifier
