following video, not working

[mburnskaurin]

(Now I am unsure if my recommendation on keep="true" fell onto my feet… )

The mix of keep="true" and append="true" does not work here. If you keep the entire data for the gyroscope y axis, you should overwrite the velocity container on each analysis run, i.e. append="false" (it's the default). If the data gets appended, you simply will not see it in the graphs as there are far less time stamps for the quadratically growing velocity container. By the way, you could observe in the graph how often the analysis block is run from the –sort of– “periodicity”.

This approach (the same as in the standard “roll” experiment) is repeating quite some multiplication work, however, the amount of data is low so you should not ever observe an effect.

Okay, I thought that I was following the video.  To be blunt, the usage of "keep" and "append" does not make sense to me--is there a document that describes how these things work in practice?

So, I should use keep true, append false for the calculated linear velocity?