HP 50g: Integration of EXP(-X^2)
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From: Bjoern Schliessmann on 20 Apr 2008 07:36 Hello, the Ti folks can integrate EXP(-X^2), e. g. from -infinity to infinity. If I try this on my 50G this way: * enter integral in equation editor, ENTER * EVAL it (X becomes Xt?!) * ->NUM .... it says "->NUM error: Overflow". With both borders real it works though. How could I work around this problem and calculate this integral with infinite borders? Regards, Bj�rn -- BOFH excuse #431: Borg implants are failing
From: John H Meyers on 20 Apr 2008 08:10 On Sun, 20 Apr 2008 06:36:25 -0500, Bjoern Schliessmann wrote: > the TI folks can integrate EXP(-X^2) from -infinity to infinity. '\.S(-\oo,\oo,EXP(-SQ(X)),X)' \->NUM Result: 1.7724538509 Flags: { #7881A10201615FF1h #0 #5150410A214020h #0 } [r->] [OFF]
From: Bjoern Schliessmann on 21 Apr 2008 18:14 John H Meyers wrote: > On Sun, 20 Apr 2008 06:36:25 -0500, Bjoern Schliessmann wrote: > >> the TI folks can integrate EXP(-X^2) from -infinity to infinity. > > '\.S(-\oo,\oo,EXP(-SQ(X)),X)' \->NUM > > Result: 1.7724538509 Thanks. Unfortunately, this gave me an overflow error just as before ... > Flags: { #7881A10201615FF1h #0 #5150410A214020h #0 } So some flags may be set wrongly -- how can I correlate the menu entries with those numbers? > [r->] [OFF] I'm sorry, I don't understand. What should be turned off, is it about base conversions? Regards, Bj�rn -- BOFH excuse #23: improperly oriented keyboard
From: Thomas Becker on 21 Apr 2008 19:18 Bjoern Schliessmann WROTE: > John H Meyers wrote: >> [r->] [OFF] > > I'm sorry, I don't understand. What should be turned off, is it > about base conversions? I vote for having this text on the next probe to outer space, who is with me? Thomas -- All your base are belong to us
From: username localhost on 21 Apr 2008 23:30
On Apr 21, 6:14 pm, Bjoern Schliessmann <usenet- mail-0306.20.chr0n...(a)spamgourmet.com> wrote: > John H Meyers wrote: > > On Sun, 20 Apr 2008 06:36:25 -0500, Bjoern Schliessmann wrote: > > >> the TI folks can integrate EXP(-X^2) from -infinity to infinity. > > > '\.S(-\oo,\oo,EXP(-SQ(X)),X)' \->NUM > > > Result: 1.7724538509 > > Thanks. Unfortunately, this gave me an overflow error just as > before ... > > > Flags: { #7881A10201615FF1h #0 #5150410A214020h #0 } > > So some flags may be set wrongly -- how can I correlate the menu > entries with those numbers? The easiest thing to do would be to set those flags as he had the, using STOF, and slowly change flags back to your preferred settings, trying the calculation after every few changes to find out where the problem is. > > [r->] [OFF] > > I'm sorry, I don't understand. What should be turned off, is it > about base conversions? That is just one of John H Meyer's signature lines. It stands for the rightshift "OFF" (ON key) combination that turns the calculator off. As far as I can tell, that means he actually tested what he talked about on his calculator, and since he is done, he turns it off. > Regards, > > Björn > > -- > BOFH excuse #23: > > improperly oriented keyboard |