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Topic: Polygraph Fill Rate
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EMebane



Joined: Apr 15, 2019
Posts: 73

PostPosted: Sep 27, 2019 1:35 AM    Post subject: Polygraph Fill Rate

How may I change the fill rate of a Polygraph element? Signal Properties > Rate doesn't seem to do it.

I have several Polygraphs that are set up to display data from long time periods (full session graphs). They take values that have been averaged over 5-20 seconds with an F_TimeTransform. They work as intended.

I have added a new Polygraph with all the same settings and it is filling and scrolling much faster than the others. They all have different preceding Elements. I tried the Resampler Element and that delayed how frequently the new values were added to the Polygraph, however the values are spaced farther apart, so the fill/scroll rate is still a problem but the chart just has less data points. The new Polygraph has the same Time Range setting (2000 seconds) as the earlier successful Polygrapghs. Signal Properties > Rate on the connection lines of all of them are set to the same value: 0.1.

What else could it be?
jarek



Joined: Oct 22, 2007
Posts: 746

PostPosted: Sep 27, 2019 10:02 AM    Post subject:

Setting the Signal Rate on Advanced signal properties will not work here. It can be done on some elements, but only those which do not set those signal properties themselves (but just pass them through from upstream). And only to set the output signal properties.

I would probably use TimeTransform with Downsampling option. The downsampling only to speed it up, so that it doesn't have to deal with too much data which can't be shown anyway considering the pixel resolution.
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