Angle difference between two bearings

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Shikhar Singh
Shikhar Singh 2021-3-11
评论： cem polat 2022-1-20
How do I find the minimum angle difference between two angles A & B, for example:
if A = -175, B = 175 -> difference would be 10
if A = 355, B = 5 -> difference would be 10
if A = 720, B = 360 -> difference would be 0
etc.
All I know is that I have to use the absolute and modulus functions somewhere
Would appreciate any help.

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采纳的回答

Basil C.
Basil C. 2021-3-11
Read about principal angles...
For the 1st case:
A=-175 whose principal angle is 185 degree
A - B = 185 - 175 = 10 degrees
You can similarly solve the for the remaining cases
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Basil C.
Basil C. 2021-3-11
The problem with your code is that it A and B must be in the principal form for the code to work.
To solve your question, A and B need to be converted to the principal angle and then just subtract them
Shikhar Singh
Shikhar Singh 2021-3-11
How would this work for an angle like 1060 then?

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更多回答（1 个）

Basil C.
Basil C. 2021-3-12
编辑：Basil C. 2021-3-12
To convert any angle to its principal angle
function y = prin_angle(x)
y=rem(x,360); % returns the remainder when dividing by 360
if y<0
y=y+360;
end
end
Just pass both angles to above function individually to obtain the principal angle, then subtract the two outputs
OR
Just use the following code and pass both A and B directly:
function y = get_difference(A,B)
y=rem(B-A,360); % returns the remainder when dividing by 360
if y<-180
y=y+360;
elseif y>180
y=y-360;
end
end
P.S.: I have just converted the java code from above into matlab code
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cem polat
cem polat 2022-1-20
Use anglediff function in Communications or Robotics toolbox. Since anglediff uses radians, you can use a function like below for the angle diff in degrees:
function result = angdiffdeg(from, to)
result = rad2deg(angdiff(deg2rad(from),deg2rad(to)));
end

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