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5 replies

LucMeekes23-Emerald IV
23-Emerald IV
May 12, 2020

I don't think you can use a derivative in the function vector for a differential system solver.

You may need to expand the vector with one more element.

 

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Luc

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IgorBraz1-VisitorAuthor
1-Visitor
May 12, 2020

Hi LucMeekes, thanks for your answer.

 

But how to expand the vector? The problem have two defree of freedom, I don't know how to expand the vector using Rkfixed comand

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AlanStevens19-Tanzanite
19-Tanzanite
May 12, 2020

I can't see your Prime file, but judging by the PNG file, you need to do something like the following:

 

g0.jpg

(for "exolicit" read "explicit" !!!)

 

Alan

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LucMeekes23-Emerald IV
23-Emerald IV
May 12, 2020

Hi Alan,

 

attached is the OP's file for Prime2.

I had to zip it, because the forum is running stupid again.

 

Luc

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AlanStevens19-Tanzanite
19-Tanzanite
May 13, 2020

Thanks Luc,

 

Attached is my Prime 2 working version (no idea if the results make sense or not!!)

 

g0.JPGg1.JPGg2.JPG.

 

Alan

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