Deleted!

Quote from: sailerboy on September 27, 2013, 01:24:37 pm

I've got another question that may seem simple. How does one do Polynomial division?

For example, I entered (x^7+4x^3+8)/(x^2+2) in the cas mode, and it just rewrites it as a fraction. I tried using "simplify()", but that doesn't change it at all. To do division, I have to go to the on screen menu, select CAS, select Polynomial, Algebra, Quotient, and input the function, but even then, I get "Gen [int] Error: Bad Argument Type"

It seem that XCAS has no function implemented that does what you want, i.e. 'divide out' 2 polynomials (or a ratio of 2 polynomials).
Most other CAS have such a function (e.g. 'divout'), but you can define such a function yourself in the HP-Prime CAS:

divout(p):=quo(numer(p),denom(p))+rem(numer(p),denom(p))/denom(p)

Now if you enter divout((x^7+4x^3+8)/(x^2+2)) you get exactly what you want - an 'integer' part of the polynomial division and a 'remainder' part.

Franz

How do you define a function? I tried using f(a,b) := <function>, but it turned that into "table(a,b = <function>)"

I'm using the Prime's OS that it came with. There hasn't been an update, has there?



EDIT: I tried redefining, and it seemed to work. Strange...

because of a very bad forum reaction on your great kArmTI emulator).

Thankfully that has been resolved as soon as staff (the guys in blue and brown colors) were alerted about the issue (shortly after you left), otherwise staff were threatening bans for any future KarmTI bashing. One or more of them later tried to circumvent the ultimatum by downrating every post that praised the emulator, but he was probably caught a while ago because I haven't seen this happen in a long while.

I personally wish that you didn't leave just because of a few people out of many, although I can understand you considering it took a long while before the issue gets resolved (although I think at first there was confusion about the legality of KarmTI, which probably delayed the process, but harassment is even less legal anyway). After all, Omni is supposed to be a forum free of any hostility (it's even written on the front page, although you have to remember that admins are not slaves and have a life besides moderation) and this is partially why it reached record activity a few years ago. In fact, without Omni resurrection in 2008, the TI programming community would probably have been gone long ago.

Anyway back on topic, thankfully the HP Prime is much less buggy than the HP 39gII because I hardly saw reports about the calculator freezing completely after 30 seconds of use to the point where it required a firmware re-install. But yeah I was disappointed that many of the bugs went unresolved before the release, even though they affect maths. That said, however, it's not like TI and Casio calcs were always much better. The 83+, for example, had bugs that remained unresolved for almost 15 years, and TI has no staff that regularly monitors popular calc forums like Tim Wessman does with HP. Also add the fact that at least, the HP Prime is much less locked-down than the Nspire, has a much better BASIC language alternative (that can officially be programmed on-calc), a free emulator and much better specs (except RAM).

And yeah, the DWIM principle (or at least, what looks like something along those lines) seem to produce many strange effects and racking up a few nerves on MoHPC and beyond.

As far as "user friendliness" is concerned, and this is definitely NOT a minor issue(!), the average student would expect the Prime to be, at least, something better and not worse than the nspire. So, in this particular respect, AFAICT, Prime seems to be a disappointment with its funky syntax (considering the main target are the students). They'll improve it, in the coming OS release, for sure, if they want to survive.

Bug report for the emulator: When you hit CTRL+C to copy particularly large code (19 KB, for example) from the program editor to somewhere else (such as Notepad), the emulator crashes. This makes it impossible to distribute source code of large programs. This is the program in question, by the way (please do not redistribute on a CD/download archive/etc, in case I re-use it in a project. I would rather release the final product first if it comes to fruition. You can post the source here, though, since I might need it))

Because I can't get the connectivity kit to detect the emulator. I am using the TI-Planet version and on my computer, it looks different than in the screenshot:



By the way copying from emulator works fine with 9 KB programs. Some complex games will get particularly large, though.

EDIT Ok it seems that the TI-Planet download link was outdated. I got another copy from ftp://ftp.hp.com/pub/calculators/Prime/ and it works fine now.