Highlight some points in a strip chart

[MikeD]

Hi,

is it possible to highlight 1 or 2 points in a strip chart (that already has data in it) after the program has finished to write to it.

Lets say I would like to put a cross or a red dot to position  x,y  ;  x being time=5 seconds, and y = whatever value I have on the Y scale.

Thank you.

[Ben]

I posted some examples using anotations in this thread.

Both this

And this

 are shown in that thread.

Ben

[MikeD]

Thank you.

That seems to work fine for a graph, but I'm using a strip chart because of the autoscaling features.

[Ben]

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@MikeD wrote:

Thank you.

That seems to work fine for a graph, but I'm using a strip chart because of the autoscaling features.

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In your original post you wrote "after the program has finished to write to it.".

So copy the data from the chart to a graph and use the techniques described in the previously linked thread.

Alternatively you could maintain your history in a shift register and just use a graph all the way through.

To the best of my knowlege the functions for annotating a display are only available for graph type objects without resortting to developing your own code based on a LV Pciture control where you have to implmeent the scaling, buffering etc.

It's your choice. I am only trying to help.

Ben

[GerdW]

Hi Mike,

which "autoscaling features" do you use that aren't available in a graph?

[MikeD]

Thank you Ben and GerdW.

I appreciate your help.  I did more testing, and I modified my program to use a Waveform Graph instead of chart. It does have the autoscale option, so that works.

For the annotation, I have strange behaviors.

Just for test, I created a graph with an annotation, and sent the annotation data to a cluster display. I can see my X-Y position changing while I drag the annotation.

If I keep that cluster as a base to build a new cluster and only change the X-Y position using a control on the FP and write to a new graph, the position of the annotation is not correct. It may stay at 0,0 or be close to the location I want, but not on it.  I do have a multiplier of 0.25 on the X scale if that makes a difference?

All the rest of the cluster is the same as what I was reading from my previous test.  Index needs to be 14 (default was 0), I don't know what that index is for though.

I will continu to work on it tomorrow.

Thanks again.