|Re: Why not an HP-71B ? (Re: Are Matrices Relevant?)|
Message #26 Posted by Valentin Albillo on 30 Oct 2007, 10:17 a.m.,
in response to message #25 by Gene Wright
Hi again, Gene:
"Going with the 71B would be more expensive and require programming in BASIC rather than in an interactive way, such as can be done
on the 42s and graphing series."
I don't concur with what you're saying, at all. What do you mean "require programming in BASIC rather than in an interactive way" ?
You don't need any programming at all to use most of the HP-71B capabilities right from the keyword, interactively. That includes matrix capabilities, of course: you don't need to write a single line of code to declare, input and output matrices, to invert them, perform arithmetic with them, solve linear systems, or whatever, be they real- or complex-valued.
Just for instance, to solve a typical 3x3 system, say, you'd key in:
DIM A(3,3),B(3),X(3) [ENTER] (declare matrices)
MAT INPUT A,B [ENTER] (input values)
MAT X=SYS(A,B) [ENTER] (solve the system)
MAT DISP X [ENTER] (output results)
and as you can see, everything's been done interactively, right from the keyboard, without ever entering even a single program line.
"I just didn't think the 71B fit either of those categories. :-)"
Lame excuses won't save you this time, just simply recognize that you *hate* the HP-71B because it hasn't built-in financial functions like the SHARP EL-5510 handheld does ... :-) :-)
"BTW, great articles, Valentin, in the latest Datafile issue!"
Thank you very much, glad you liked them. Depending on how the incoming HPCC AGM comes out next 10th November 2007, they might turn out to be my last articles for Datafile in the foreseeable future, so keep them for collectible value.
Best regards from V.