Path: utzoo!utgpu!news-server.csri.toronto.edu!rutgers!ub!boulder!frechett
From: frechett@boulder.Colorado.EDU (-=Runaway Daemon=-)
Newsgroups: comp.sys.handhelds
Subject: Re: Eq. Lib. Multiple Eq. Solver --> junk?
Message-ID: <27260@boulder.Colorado.EDU>
Date: 30 Sep 90 03:28:00 GMT
References: <3343@mindlink.UUCP>
Sender: news@boulder.Colorado.EDU
Reply-To: frechett@snoopy.Colorado.EDU (-=Runaway Daemon=-)
Organization: University of Colorado, Boulder
Lines: 53

In article <3343@mindlink.UUCP> a309@mindlink.UUCP (George Lin) writes:
>This seems like a very simple question, but I have tried for the last 2 days to
>get my 48SX w/ Equation Card (& Multiple Equation Solver) to solve a
>simultaneous equation.  I can't get the thing to work.
>simple example:
>
>  'A':  '1*X+2*Y=3'
>  'B':  '4*X-5*Y=6'
>  'EQ' { A B }
>
Simple solution for this problem.  I have been doing these for the last 
week with great success.  Use the matrix writer.  Make these two matrixes.
[3 6]
[[1 2]
 [4 -5]]
And then simple hit /
and boom it gives you 
[2.07692307692
.461538461538]
Do a 2D to dump to stack... (OBJ-> works too  ;)
then ->Q SWAP ->Q SWAP and I now have
'27/13'
'6/13'
 Slick as sh*t.  I have been hashing through matrixes in circuits and have 
managed to do a few good 6 X 6.
>   Ok, the correct solution is X=27/13, Y=6/13.
yep
>
>But it gets harder to do when the 2 eqation with 2 unknows are like this:
Yes and I Don't know what to do with this one because you can only input
numeric values into the matrix writer.  
>
>  'A':  '1*SIN(X)+2*COS(Y)=3'
>  'B':  '4*SIN(Y)-5*COS(X)=6'
>  'EQ': { A B }
>
>(well, Ok, it's still not too hard to rearrange, but you know what I mean)
>
>So, any HP gods out there know how to solve simultaneous equations (on the HP
>that is)?
I have not run into this type of problem but I would still be interested in the
solution.  Fun fun fun...
>
>--------------------------------
>George Lin
>a309@mindlink
>uunet!van-bc!rsoft!mindlink!George_Lin

	ian

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