confused with atan2d for negative number

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Rica
Rica am 26 Jun. 2013
hi,
why is atan2d(-3,-1) is diffrent than atan2d(3,1)?
thank you

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David Sanchez
David Sanchez am 26 Jun. 2013
Because you measure the angle in a different quadrant. It's not the same -20 degrees than 20 degrees. Matlab documentation is very explicative, visit it for further details.

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