HP Forum Archive 21

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HP 35s polar/rectangular conversion Message #1 Posted by CD Dodds on 28 Nov 2013, 12:25 p.m. When you do rectangular/polar conversion you enter it as a complex number and change the display format according to what you want to see. Is there a way to separate the angle from the vector, or the "x" coordinate from the "y" coordinate? Like retrieving the fraction part or integer part from a number.

Re: HP 35s polar/rectangular conversion Message #2 Posted by Michael de Estrada on 28 Nov 2013, 12:30 p.m., in response to message #1 by CD Dodds Buy a used 33s or 32SII. Problem solved.

Re: HP 35s polar/rectangular conversion Message #3 Posted by Dieter on 28 Nov 2013, 12:44 p.m., in response to message #1 by CD Dodds The 35s has no commands to split a complex number into its real and imaginary part. However, polar coordinates are easy: Convert (3; 4) to polar coordinates 3 i 4 [DISPLAY] .0 => 5,0000 (theta) 53,1301 or the other way (polar to rectangular) 5 (theta) 53,1301 [DISPLAY] 9 => 3,0000 i 4,0000 Both display options represent the same number. To obtain distance and angle (in either display mode): [ABS] => 5,0000 ' distance LastX [ARG] => 53,1301 ' angle Getting the rectangular coordinates 3 and 4 from this is a bit tricky, though. ;-) Dieter Edited: 28 Nov 2013, 12:50 p.m.

Re: HP 35s polar/rectangular conversion Message #4 Posted by CD Dodds on 28 Nov 2013, 1:56 p.m., in response to message #3 by Dieter I have a 32sII and it has always been one of my favorites. Have a 33s it works but never got attached to it. I am helping teach a "land surveyor in training" course at the annual state survey convention and we need to use calculators that are allowed on the Federal Land Surveyor in Training test. I do like the 35s and I like it even better now. Thank you Dieter for your help. It's much appreciated. Chad

Re: HP 35s polar/rectangular conversion Message #5 Posted by R. Pienne on 28 Nov 2013, 2:08 p.m., in response to message #1 by CD Dodds For rectangular coordinates, you can use the following programs: Real: LBL R ABS LASTx ARG COS x RTN Imaginary: LBL I ABS LASTx ARG SIN x RTN

Re: HP 35s polar/rectangular conversion Message #6 Posted by CD Dodds on 28 Nov 2013, 2:25 p.m., in response to message #5 by R. Pienne I think I can combine these into one program so you're left with the x and y coordinates on two levels of the stack just like the 32sII did when you did the conversion. Thanks Chad

Re: HP 35s polar/rectangular conversion Message #7 Posted by Dieter on 28 Nov 2013, 2:39 p.m., in response to message #6 by CD Dodds This kind of solution was discussed in detail as soon as the community realized that there are no traditional P<>R commands on the 35s. Some routines (that even preserve the stack) can be found in this discussion from 2007. A summary of all efforts, with optimized solutions, can be found in the articles section on this website. Here, even the state of flag 10 is preserved. Dieter

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