Express XY plot - Overplot timeline

[gborges]

I tried to plot a graph using the XY Express. The X axis is a timeline.


The problem starts to occur after 5 minutes. The X axis (timeline) doesn't move itself, but for instance, there is no problem if the timeline axis moves. The past is not too important for me, only two minutes of history, I have to check and analize.

You can view what is occuring as showed in the attached pictures.

How can I solve this problem?

[gborges]

Is there anyother type of graph that I can use to do this job? If anyone has an example, it would be a good idea to share it with me.

[JeffBoettcher]

Can you reproduce this in just a simple VI?  Perhaps these screenshots are already from a simple test VI.  Regardless, if you could post the VI that would be most helpful in trying to understand what's going on, thanks!

[gborges]

Hi Jeff!

If you look at test2 picture, you will see that after some time, the graph returns to the begining and the old data was not erased. I would like to have a graph that the timeline (X axis) is fixed in 2 minutes, for example. So, while the time is passed by the X axis follows it.

Do you understand the problem? I am a beginner, it should be a simple question but, maybe I am not clear enough to explain it.

I don't have the example to show you, but I will try in one to show you.

Thank you in advance.

[JeffBoettcher]

I'm sorry, no, I don't understand the problem.  While I could make certain assumptions, without knowing what the VI looks like that generated those graphs, I don't see how it'd be possible for anyone to understand the problem.  A VI would be helpful.

[gborges]

The explaination:

There is a streaming that I connected to an Express XY graph. This streaming is linked to Y axis. The X axis is the timeline.

The problem is that after some time, as you can see at test2.jpg the time was 00:04:10 and in the instant after that it was 00:00:00. The X axis is receiving a timestamp data, that does not goes back to the past, so, this is the problem. Why the timeline is going back to the past?

Is there a solution for this problem?

Thank you in advance.

Message Edited by gborges on 06-30-2006 09:36 AM