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Chapter 12

Case and Sequence Structures and the Formula Node

12-14

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Block Diagram

3.

Build the block diagram shown in the following illustration.

Formula Node (Functions»Structures). With this node, you can enter 
formulas directly. Create the three input terminals by popping up on 
the border and choosing Add Input. You create the output terminal by 
choosing Add Output from the pop-up menu.

When you create an input or output terminal, you must give it a 
variable name. The variable name must match the one you use in the 
formula exactly. The names are case sensitive. That is, if you use a 
lowercase 

a

 in naming the terminal, you must use a lowercase 

a

 in the 

formula. You can enter the variable names and formula with the 
Labeling tool.

Note

;

Numeric Constant (Functions»Numeric). You also can pop up on the 
count terminal and select Create Constant to create and wire the 
numeric constant automatically. The numeric constant specifies the 
number of For Loop iterations. If 

x

 range is 0 to 10 including 10, you 

must wire 11 to the count terminal.

Because the iteration terminal counts from 0 to 10, you use it to control 
the 

x

 value in the Formula Node.

Build Array (Functions»Array) puts two array inputs into the form of 
a multiplot graph. Create the two input terminals by using the Resizing 
cursor to drag one of the corners. For more information on arrays, see 
Chapter 14, 

.

4.

Return to the front panel and run the VI with different values for 

m

 

and

b

.