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Chapter 14
Arrays, Clusters, and Graphs
14-20
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National Instruments Corporation
Graph Axes
You can format the scales of a graph to represent either absolute or relative
time. Use absolute time format to display the time, date, or both for your
scale. If you do not want G to assume a date, use relative time format.
To select absolute or relative time format, pop up on the chart and select
the scale you want to modify. Select Formatting…. This enables the
Formatting dialog box, which you can use to specify different attributes
of the chart.
Data Acquisition Arrays
Data returned from a plug-in data acquisition board using the Data
Acquisition VIs can be in the form of a single value, a 1D array,
or a 2D array. You can find a number of graph examples located in
Examples\G Examples\General\Graphs
, which contains VIs to
perform varied functions with arrays and graphs.
Activity 14-4. Use the Graph and Analysis VIs
Your objective is to build a VI that measures temperature and displays the
values in real time. It also displays the average, maximum, and minimum
temperatures.
Front Panel
1.
Create a new front panel as shown in the following illustration.
You can modify the point styles of the waveform chart and waveform
graph by popping up on their legends. Scale the charts as shown.