Need help using Matlab

[Vaishnavi Mantraratnam]

Hi all,

I hope you are all doing well.

I am needing some urgent help analyzing some data from a trx file on Matlab. I have several trx files I need to analyze and I am wondering if someone can help me out?

I did an x-ray experiment on drosophila to understand their behavior after being irradiated. You can see my abstract here https://docs.google.com/document/d/1fBk059pHHDdwrswcDHPCH7V5MEChl4Ip6Shs3WoSW2Y/edit?usp=sharing 

I have some data I am trying to analyze via Matlab. I know at which frame of a video that an x ray was given to a fly. I have several .trx files to analyze and I am mainly concerned with the vel mag ctr variable. I attached one of my files below. Can someone please help me understand how to use Matlab to find the average velocity within a given number of frames to compare pre and post the x-ray stimulus? https://drive.google.com/file/d/1h1y0FCd-Ojrqk33J12wEwFI1k36MqYlR/view?usp=sharing