Form guess structure for extending boundary value solutions
solinit = bvpxtend(sol,xnew,ynew)
solinit = bvpxtend(sol,xnew,extrap)
solinit = bvpxtend(sol,xnew)
solinit = bvpxtend(sol,xnew,ynew,pnew)
solinit
= bvpxtend(sol,xnew,extrap,pnew)
solinit = bvpxtend(sol,xnew,ynew) uses
solution sol computed on [a,b] to
form a solution guess for the interval extended to xnew.
The extension point xnew must be outside the interval [a,b],
but on either side. The vector ynew provides an
initial guess for the solution at xnew.
solinit = bvpxtend(sol,xnew,extrap) forms the guess at
xnew by extrapolating the solution sol.
extrap has three possible values:
'constant' — ynew is a value
nearer to end point of solution in sol.
'linear' — ynew is a value at
xnew of linear interpolant to the value and slope at
the nearer end point of solution in sol.
'solution' — ynew is the
value of (cubic) solution in sol at
xnew.
The value of extrap also can be a string.
solinit = bvpxtend(sol,xnew) uses
the extrapolating solution where extrap is 'constant'.
If there are unknown parameters, values present in sol are
used as the initial guess for parameters in solinit.
solinit = bvpxtend(sol,xnew,ynew,pnew) specifies
a different guess pnew. pnew can
be used with extrapolation, using the syntax solinit
= bvpxtend(sol,xnew,extrap,pnew). To modify parameters
without changing the interval, use [] as place
holder for xnew and ynew.