PDA chart options?

[GHernandez]

I am trying to plot a change in resistance data to a waveform chart, but for some reason.. SI notiation enabled on windows does not show on the PDA.. Also an x-scrollbar is not there.
Is this normal?

[GHernandez]

:bump:

[GHernandez]

I am using a pda chart wired to from an array and for some reason it does not display 8 plots at all, windows or PDA. The only time it allows me to do so in windows is when I convert it to a cluster and then plot the waveform chart, but that causes the PDA to crash! Any help is greatly appreciated.

[tst]

I don't know about 8, but at least older versions did have a problem with multiplot charts. What you need to do is simulate the chart by using an XY Graph with your own FIFO implementation. This is fairly simple to do by using a functional global. You replace the first element and then rotate the array by -1 to bring that element to the end.

As for creating multiple plots, yes, that can only be done by bundling the plots into a cluster, and there are several examples in the example finder to show this.

[GHernandez]

thanks for the help. Nice VI you wrote. But unfortunately I need the history in the graph, so I guess I am going to have to wait untill the 8.1 upgrade and hope this fixes the issue.

[JLS]

Hello,

For reference, here's a link to the module manual for version 8:

http://www.ni.com/pdf/manuals/371296a.pdf

There is a section called "What's New in LabVIEW 8.0 PDA Module" which is a good reference for new features in 8.0.  Sorry if it's lacking some things you need 😞

Best Regards,

JLS

[GHernandez]

Do you know by any chance the release data for the point upgrade? It be great if LV would be open source or allow contribuitors that are non-NI, which would allow updates/patches to be released in a timely matter.

[tst]

You can have the history by keeping all the history you want in the shift register and extracting only the part you want to display. You could probably also use a scroll bar or buttons to change the display.

Part of what makes LV good is the fact that it is a proprietary product in which enhancements to the language can be made without NI having to coordinate with any other body. This allows it to advance. That is just one of the reasons why NI is unlikely to make LV or G open source. The patents which are about to start expiring in a year or so do leave room for people to create an open source G, but without financial support and the cooperation of NI I don't think such a project would work.

I believe the 8.01 patch is supposed to come out in 4-6 months, but there is no guarantee that this will be fixed there.