The Museum of HP Calculators

HP Forum Archive 17

 Complex number on HP 35sMessage #1 Posted by Marcel Pelletier on 7 June 2007, 9:41 a.m. On the PDF data sheet we have, I remark that the HP 35s was on RPN mode whit a strange number that I think is a new way to enter a complex number on the stack. For exemple, the number (5+15i) is enter like this: enter 15 press "i" key enter 5 press "enter" key. Then you have 15i5 on the stack! So this method permit to have a whole complex number in a register. The HP 35s can now have a new COMPLEX MODE like the HP 15c! What do you think of that?

 Re: Complex number on HP 35sMessage #2 Posted by Doctor Bubu on 7 June 2007, 10:21 a.m.,in response to message #1 by Marcel Pelletier Hallo Marcel! Would you be so kind to send me the PDF, because i missed to store it. mail@diewilde13.de Thank you Juergen

 Re: Complex number on HP 35sMessage #3 Posted by Kevin on 7 June 2007, 10:23 a.m.,in response to message #2 by Doctor Bubu You can find a copy of the pdf here: http://www.hpcc.org/calculators/35s.pdf Best Regards, Kevin

 Re: Complex number on HP 35sMessage #4 Posted by Donald on 7 June 2007, 1:56 p.m.,in response to message #1 by Marcel Pelletier Quote: So this method permit to have a whole complex number in a register. The HP 35s can now have a new COMPLEX MODE like the HP 15c! I hope it's better than the 15C's: If the HP35s stack supports data types, i.e. assuming good design based on the HP28/48/50 series, the complex numbers, bit-types, and alpha prompts etc. should all be directly storeable in memory and not just stack registers. On the HP15C splitting and storing complex numbers into two registers is a pain, partitioning gets even worse when dealing with complex matrices. Has the 35S's stack depth been mentioned yet ? It's unclear to me if the classic 4 deep stack is used or a deeper RPL like stack, or even a flag to switch between those 2 modes.

 Re: Complex number on HP 35sMessage #5 Posted by bill platt on 7 June 2007, 2:16 p.m.,in response to message #4 by Donald I think it is quite safe to bet that: 1. There will not be an RPL kernel and no advanced "datatypes" on the stack. Perhaps they will have a complex datatype, but that will be it (for stack types). Prgrams have labels, also equations and equations as comments in same fashion (via flag) as the 32sii. 2. Stack depth is almost certainly 4 deep. This model, in addition to being celabration of the classic RPN of the 35, is also most likely to be compatible with the earlier kin--the 32sii and the 33s. 3. HP already has the 50g for the top of the line RPL, and hte 48GII for the lower-cost RPL, and the 39G+ for the algebraic RPL. I don't see why they would make this machine RPL--it would merely reduce its sales potential to those loking for a "scientific" rather than a graphing, and it would rob sales from the RPL models.

 Re: Complex number on HP 35sMessage #6 Posted by Donald on 7 June 2007, 2:38 p.m.,in response to message #5 by bill platt Quote:I don't see why they would make this machine RPL I didn't really want to suggest a RPL mode .. merely a dynamic depth stack option.

 Re: Complex number on HP 35sMessage #7 Posted by Karl Schneider on 9 June 2007, 3:31 p.m.,in response to message #1 by Marcel Pelletier Quote: The HP 35s can now have a new COMPLEX MODE like the HP 15c! What do you think of that? What do I think? I hope that the capability is better than that of the HP-15C, and also that of the HP-42S in certain ways. If it's close to what I advocated as follows, I'll be very pleased: "User-friendly complex numbers" at http://www.hpmuseum.org/cgi-sys/cgiwrap/hpmuseum/archv014.cgi?read=63415#63415 -- KS

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