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Calculate closest fraction or sqrt...

Posted: Sat Jan 04, 2020 11:44 am
by fridlmue
Hi there,

when i was searching on a program to calculate somehow close fractions or, even better, show a close pi or sqrt value i found this program:

https://www.hpmuseum.org/software/qpi/42sqpi.htm

Now I'm curious if the behavior on the DM42 is different then on the HP42s.
Because I do net get e.g. sqrt(2) or -sqrt(2) as result. As well I do get values with pi up to 4*pi. But with 5*pi it gives a "normal" fraction. Is this the same on the original HP42s?
Can I modify the code to work as intended on the DM42?
I think this is a very useful program.

Best regards
Friedrich

Re: Calculate closest fraction or sqrt...

Posted: Sat Jan 04, 2020 12:00 pm
by Dani R.
For whatever reason, the QPI program is dependent on the set DISP. Therefore I have configured FIX 06 as default.

Re: Calculate closest fraction or sqrt...

Posted: Sat Jan 04, 2020 5:36 pm
by fridlmue
Ah, yes, you are right! If I go to more digits it becomes better. Is it possible to change that behavior?

Re: Calculate closest fraction or sqrt...

Posted: Sun Jan 05, 2020 11:16 pm
by cdmackay
I thought that was deliberate, to allow you to set the required accuracy?