Strange results - Сообщения
#1 Опубликовано: 04.05.2011 16:31:10
I've been using SMath (0.89) for about a year now and never experience this. Its why I alway put the result next to the equation to be sure I'm getting a reasonable result. The value of Wdsw is 10^31 when it should have been only 757. If I set optimization as Numeric I get the correct result. More reason to keep a check on running results. If I hadn't who knows what the final result would be. 
Ed
#2 Опубликовано: 05.05.2011 06:58:51
Hello Ed,
This is one more example among others where the "Symbolic" optimization had problems with. I tried to reproduce it and the value of W.dsw is somewhat different than in your case.
[LIVE width=461 height=588]http://smath.info/live/?file=2711[/LIVE]
Here - "None" or "Numeric" will give the correct numerical value.
Someone on this Forum suggested having the option to set "None" or "Numeric" as default instead of "Symbolic". optimization. I suppose that this might be one of the possibility, until the fixing of this problem.
Regards,
Radovan
This is one more example among others where the "Symbolic" optimization had problems with. I tried to reproduce it and the value of W.dsw is somewhat different than in your case.
[LIVE width=461 height=588]http://smath.info/live/?file=2711[/LIVE]
Here - "None" or "Numeric" will give the correct numerical value.
Someone on this Forum suggested having the option to set "None" or "Numeric" as default instead of "Symbolic". optimization. I suppose that this might be one of the possibility, until the fixing of this problem.
Regards,
Radovan
When Sisyphus climbed to the top of a hill, they said: "Wrong boulder!"
#3 Опубликовано: 18.05.2011 05:10:25
atan(0.5) = 1.5359 according to SMath Studio... I beg to differ
angle units set to degrees
using version 0.89 (build 3856)
angle units set to degrees
using version 0.89 (build 3856)
#4 Опубликовано: 18.05.2011 05:30:07
Hello,
This was a known issue and corrected in 0.89.9. There is no "Angle units" option anymore
radians - no units or unit "rad"
degrees - units "deg" or "°"
[LIVE width=226 height=60]http://smath.info/live/?file=2754[/LIVE]
Strange?? Live version gives wrong result here. The 0.89.8 version gives the correct result
atan(0.5)=26.5651@'deg
Regards,
Radovan
EDIT: I messed up with "grad" and "deg", sorry
This was a known issue and corrected in 0.89.9. There is no "Angle units" option anymore
radians - no units or unit "rad"
degrees - units "deg" or "°"
[LIVE width=226 height=60]http://smath.info/live/?file=2754[/LIVE]
Strange?? Live version gives wrong result here. The 0.89.8 version gives the correct result
atan(0.5)=26.5651@'deg
Regards,
Radovan
EDIT: I messed up with "grad" and "deg", sorry
When Sisyphus climbed to the top of a hill, they said: "Wrong boulder!"
#5 Опубликовано: 18.05.2011 08:04:48
Hello Radovan,
I think, SMath live calculates correct.
But the result unit is grad, not degree (400grad = 400gon = 360degree).
Best Regards,
Peter
I think, SMath live calculates correct.
But the result unit is grad, not degree (400grad = 400gon = 360degree).
Best Regards,
Peter
#6 Опубликовано: 18.05.2011 08:33:12
...But the result unit is grad, not degree (400grad = 400gon = 360degree).
Thank you Peter, you are right.
Sorry, my mistake - I messed up "grad" and "deg"
Regards,
Radovan
When Sisyphus climbed to the top of a hill, they said: "Wrong boulder!"
#7 Опубликовано: 19.05.2011 01:35:16
Hello Radovan,
in my opinion the unit 1grad = 1gon in SMath leads to mistakes, because grad is
normally used as alternative for deg.
To avoid confusion and mistakes I recommend to delete the unit grad from the unit-list in SMath or redefine it.
Btw., in MathCad: 1Grad = 1deg
Best Regards,
Peter
in my opinion the unit 1grad = 1gon in SMath leads to mistakes, because grad is
normally used as alternative for deg.
To avoid confusion and mistakes I recommend to delete the unit grad from the unit-list in SMath or redefine it.
Btw., in MathCad: 1Grad = 1deg
Best Regards,
Peter
1 пользователям понравился этот пост
Radovan Omorjan 19.05.2011 02:18:00
-
Новые сообщения
-
Нет новых сообщений