How to convert radians to degrees?
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Hi, I have this code,
clear all, close all, clc,
r = 0.08;
t = 2;
for n = 1:180,
M(1,n) = r*cos(t); %x length from center
M(2,n) = r*sin(t); %y length from center
t = t+2;
end
It is meant to find the x,y distance from the center of a circle with fixed radius (Basically calculating x,y coordinates of circumference).
However the coordinates are coming wrong and it is because Matlab is performing calculations in radians rather than in degrees. (I cross checked the values with calculator) And I don't know how to convert to radians, and none of the forum results made sense to me.
Thanks, Rohan
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Answers (3)
José-Luis
on 21 May 2013
Edited: José-Luis
on 21 May 2013
There is a built in function for that:
doc deg2rad
But it is rather trivial to implement it yourself:
myTrans = @(x) x./360.*(2.*pi());
myTrans(180)
ans =
3.1416
6 Comments
Ivan-V-Timofeev
on 4 Nov 2014
deg2rad
It does not work without toolbox > geo > private > deg2rad.m http://mooring.ucsd.edu/software/matlab/doc/toolbox/geo/private/deg2rad.html
Iain
on 21 May 2013
Degrees = 180 * radians / pi.
Rearrange as needed ;)
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Iain
on 21 May 2013
Radians = degrees * (pi/180)
"t" is in degrees, and you want it in radians when put into cos and sin.
cos(t * (pi/180)) and sin(t * (pi/180)) is the conversion rearranged as needed, AND put in the right place...
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