Rkadapt Diverges/Unstable

Rkadapt Diverges/Unstable - Rkadapt Diverges/Unstable - Messaggi

#1 Pubblicato: 05/01/2018 18:43:03
Jean Giraud

Jean Giraud

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Bugs Rkadapt.sm (8,66 KiB) scaricato 1390 volta(e).
#2 Pubblicato: 06/01/2018 05:18:22
Radovan Omorjan

Radovan Omorjan

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Hello Jean,

It will work for me.

ode.PNG

I think you should use the last point in the results (N+1, n+1 rows). There is no point in increasing to much the number of steps. Moreover, increasing N for Rkadapt() will cause its failing (The maximum number of iterations is exceeded). For dn_GearsBDG() will do do job but the number of steps will not change the final results (only the calculation time will increase by increasing n)

Regards,
Radovan

P.S

Hmm...I can not remember if there is a possibility to change the accuracy of these algorithms .

EDIT: Ah yes, by setting the variables AbsTol and RelTol (see the Martin's Reference Handbook)
When Sisyphus climbed to the top of a hill, they said: "Wrong boulder!"
2 utenti hanno apprezzato questo post
Davide Carpi 06/01/2018 06:21:00, frapuano 06/01/2018 08:27:00
#3 Pubblicato: 06/01/2018 13:46:06
Jean Giraud

Jean Giraud

983 apprezzamenti in 6.866 post.

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Thanks Radovan,

Wiil post the work sheet next minute in

Jean

RkadaptStability.PNG
1 utenti hanno apprezzato questo post
frapuano 06/01/2018 19:27:00
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