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vx and vy not being calculated post and replies

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vx and vy not being calculated - Aug 29 at 6:08PM
Edson Valle
1 Posts

Hello
I'm using tracker to track a point particle in a video. The software tracks well the "y" and "x" positions, however does not display the velocities and accelerations (vx, vy, ax and ay).
Other files that I created in the past worked ok, however in this new video they are not displayed.
If I start any other video it also does not display properly.
I'm using tracker 5.0.6 in a linux 32 bits (ubunto 14.04)
Attached is a screenshot of my table data.

Attached File: Seleo_012.png


Replies to vx and vy not being calculated

Re: vx and vy not being calculated - Sep 03 5:29PM
Douglas Brown Avatar
Douglas Brown
216 Posts

It looks like you have skipped steps when marking. Velocities and accelerations cannot be determined when steps are skipped. See "1. Marking and editing the steps" in Tracker Help/Point Mass.  Doug



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