Calculate heading angle and Azimuth

I have data that records the 2D movement of an animal over time(head coordinates, tail coordinates and centroid). I want to calculate the heading angle, the azimuth of the animal. Can I calculate heading by heading=atan((head(1,2)-centroid(1,2))/((head(1,1)-centroid(1,1)))); and then converting into angle by using heading=heading*(180/pi). And for azimuth can it be calculated by compassHeading = mod(90-heading,360?

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https://in.mathworks.com/matlabcentral/answers/101590-how-can-i-determine-the-angle-between-two-vectors-in-matlab