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How to find angles, which lies between -π and -2π.Because matlab returns only values between ±π using atan or atand function.

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gfgf99
gfgf99 2015-6-2
评论： Walter Roberson 2015-6-2
Because matlab returns only values between ±π using 'atan' or 'atand 'functions.i want to get an angle between -π and -2π. Are there any solution to do that using functions? i'm finding a solution without using a absolute value(abs function)
thank you

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回答（2 个）

Roger Stafford
Roger Stafford 2015-6-2
Do this to your angle, 'a':
a = mod(a,pi)-2*pi;
It will then lie between -2*pi and -pi.
[Note: atan gives angles between -pi/2 and +pi/2, not -pi and +pi.]
Walter Roberson
Walter Roberson 2015-6-2
Use unwrap()

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