hp49g+ and vectors  Printable Version + HP Forums (https://archived.hpcalc.org/museumforum) + Forum: HP Museum Forums (https://archived.hpcalc.org/museumforum/forum1.html) + Forum: Old HP Forum Archives (https://archived.hpcalc.org/museumforum/forum2.html) + Thread: hp49g+ and vectors (/thread90583.html) 
hp49g+ and vectors  Chelsey  04052006 i am writing a survey progarm and want to use vectors so that i can easily change coordinate systems, by going from rectangular to polar it will put my vectors into an azimuth and a distance. problem vectors read 0 going east and turn counterclock wise, i want 0 to be north and turn clockwise? Re: hp49g+ and vectors  Chris Dean  04052006 From a mathematical view point i think if you rotate your vector through 90 degrees about the Z or yaw axis and then about 180 degrees about the x or roll axis you should then get the vector in the required axis system. The result is that the azimuth angle will Edited: 6 Apr 2006, 4:53 a.m.
Re: hp49g+ and vectors  Vieira, Luiz C. (Brazil)  04052006 Hi, Chelsey; I have already written many survey programs to either RPN or RPLbased calculators, and the same circunstance applies. You see, there is no matter how the calculator counts or positions angles because it doesn't have any reference to quadrants. You just have to worry about how to create these cardinal references and how to identify in which quadrant the coordinate is located. If you enter (200,200)and asks for its argument, the HP49G+ returns 135If you enter (200,200)the argumetn now is 45If you consider that either (200,200) or (200,200) are coordinates and you have them already 'coded' as north, south, east or west by simply working with their signal, then it doesn't matter how the calculator interprets angles, you just need to work with the returned value as it is. Now, if you enter (200,200)and asks for its argument, the HP49G+ returns 45and if you enter (200,200)the returned argument is 135I do not have the listings right here, but I remember that these outputs did not cause me much trouble computing the azymuth. If you need further info, let us know. Cheers. Luiz (Brazil)
Edited: 5 Apr 2006, 4:45 p.m.
