How to Create an XY Chart in LabVIEW

Updated Apr 9, 2020

Reported In

Software

  • LabVIEW

Issue Details

I want to use an XY Graph, but I would like for it to have a history like waveform charts. What is the best way to implement this?
 

Solution

If you want an XY Graph to behave as an XY Chart by storing previous values, you must implement this behaviour programmatically.

The best way to do this is to build an array of the values, and in each iteration add the new value to the array. This array will store the values from all previous iterations in the shift registers, so they can be displayed on the chart on the next iteration. An example can be seen below:


Note: This image is a LabVIEW snippet, which includes LabVIEW code that you can reuse in your project. To use a snippet, right-click the image, save it to your computer, and drag the file onto your LabVIEW diagram.

Additional Information

  • A chart stores historical data from previous iterations and a graph does not.
  • If you open a new VI and right click on the front panel then click on the Graph Palette, you can see that there is an XY Graph option, but not an XY Chart option.