Graph Circle VI **new** 2004/06/24 14:07:16.456 GMT-5 2004/06/28 15:42:31.674 GMT-5 National Instruments certification@ni.com Elizabeth Gregory lizzardg@rice.edu Harika Basana ilsai@rice.edu Malan Shiralkar mshiralkar05@hotmail.com National Instruments certification@ni.com National Instruments LabVIEW exercise Graph Circle VI Plot data using an XY Graph. Complete the following steps to build a VI that plots a circle using independent x and y arrays.

Front Panel Open a blank VI and build the front panel shown in .

Place an XY Graph, located on the Controls>>All Controls>>Graph palette, on the front panel. Label the graph XY Circle Graph. Change Plot 0 to Circle in the plot legend. Right-click the plot in the plot legend, select Point Style from the shortcut menu, and select the small square. Change the scale labels and ranges, as shown in .

Block Diagram Build the block diagram shown in .

Place the Sine & Cosine function, located on the Functions>>Arithmetic & Comparison>>Express Numeric>>Express Trigonometric palette, on the block diagram. This function builds an array of points that represents one cycle of a sine wave and a cosine wave. Place the Bundle function, located on the Functions>>All Functions>>Cluster palette, on the block diagram. This function assembles the sine array and the cosine array to plot the sine array against the cosine array to produce a circle. Place the Pi Multiplied by 2 constant, located on the Functions>>Arithmetic & Comparison>>Express Numeric>>Express Numeric Constants palette, on the block diagram. Save the VI as Graph Circle.vi in the C:\Exercises\LabVIEW Basics I directory. Display the front panel and run the VI. Close the VI.