Skip to main content
P
ptc-53719201-Visitor
1-Visitor
November 12, 2013
Question

Odesolve Problem: There are too few equations

  • November 12, 2013
  • 1 reply
  • 5251 views

I'm trying to solve a rather large system of 7 ODEs and two algebraic "constraints". The two constraints aren't really constraints so much as two variables/functions that I need to define otherwise the whole system looks like a bigger mess than it already is. The problem is that when I put it all into a solve block with odesolve, I get the "There are too few equations." error. I tried inputting into odesolve with my two constraints as arguments and without them as arguments, but both gave me the same problem. I've been stuck at this all day and I'll appreciate any help I can get.

1 reply

P
ptc-53719201-VisitorAuthor
1-Visitor
November 12, 2013

Sorry, please ignore the original attachment and use the one attached in this post. I changed the inputs for the constraint on v and moved the algebraic constraints so that they preceded the ODEs.

V
24-Ruby IV
ValeryOchkov24-Ruby IV
24-Ruby IV
November 12, 2013

When I have ODEs I solve its as a first step with M15 than convert in Prime and input units - not D:=0.5 but D:= 0.5 m or mm or ft etc

W
Werner_E25-Diamond I
25-Diamond I
November 12, 2013

While I agree that working in MC15 is preferable - how would this tip of yours help in case of this special solve block error???

Terms & ConditionsAccessibility statement