LabVIEW

Adding comments to the timeline of a chart

Hi all,

I've been working on a project that involves continuously plotting the data from a thermocouple onto a waveform chart and interacting with the data in various ways. For the most part, the programming has been fairly simple, but there's one request that I'm just not sure how to approach.

I need to be able to add comments to the timeline of a waveform chart as the program is running, i.e. as data is being collected over a long period of time, the user should be able to click on the waveform chart and write a comment that will stick to the x-value (time) of the chart where the user clicked. Thus, if there is a strange spike in the data, the user could click on it and add a comment explaining it, which would both appear on the front panel with the data on the chart and appear in the spreadsheet that the waveform chart is dumped into.

I realize this would probably be easier to achieve with an event structure...but unfortunately the company I'm writing this program for has only the basic labVIEW package, which sadly does not include event structures