divide by zero error

#1 Posted: 1/31/2020 9:46:08 AM

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Hello to all.
I have a problem with the Smath function "dn_GearsBDF", it blocks the operation since giving me division by zero error.

How can I overcome this problem? MANOVRA (con parametri moto).sm (78 KiB) downloaded 36 time(s).

#2 Posted: 1/31/2020 10:11:20 AM

Radovan Omorjan

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Hello,

In dn_GearsBDF(init,0,end,100,D(x,Y)) replace zero with a small positive number (say 10^-10)

Regards,
Radovan

When Sisyphus climbed to the top of a hill, they said: "Wrong boulder!"

#3 Posted: 1/31/2020 12:14:51 PM

Ale16595

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Hi, thanks for the reply.
Instead if I have an error like: "value too big or too small for an Int32", how can I solve it?
Every time this error appears the program stops.

MANOVRA slalom (cinematica).sm (45 KiB) downloaded 29 time(s).

#4 Posted: 1/31/2020 12:54:54 PM

Jean Giraud

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Always separate text from image or *.sm document,
as you did: can't reply quote !

#5 Posted: 1/31/2020 1:12:46 PM

Martin Kraska

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Wrote
Hi, thanks for the reply.
Instead if I have an error like: "value too big or too small for an Int32", how can I solve it?
Every time this error appears the program stops.

MANOVRA slalom (cinematica).sm (45 KiB) downloaded 29 time(s).

10^10 was probably too small, you have to see, how small x can be for your derivative ψ''(x) still being defined. 0.01 works.

Martin Kraska Pre-configured portable distribution of SMath Studio: https://en.smath.info/wiki/SMath%20with%20Plugins.ashx

#6 Posted: 1/31/2020 2:30:34 PM

Jean Giraud

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... doctoring starts at red ... observe removing 10^14 at some trig [0].
lot more cleanup below ... can you write λ instead of l

MANOVRA slalom (cinematica).sm (52 KiB) downloaded 32 time(s).

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