Evaluate solution of differential equation problem
sxint = deval(sol,xint)
sxint = deval(xint,sol)
sxint = deval(sol,xint,idx)
sxint = deval(xint,sol,idx)
[sxint, spxint] = deval(...)
An initial value problem solver (ode45, ode23, ode113, ode15s, ode23s, ode23t, ode23tb, ode15i)
A delay differential equations solver (dde23, ddesd, or ddensd),
A boundary value problem solver (bvp4c or bvp5c).
xint is a point or a vector of points at which you want the solution. The elements of xint must be in the interval [sol.x(1),sol.x(end)]. For each i, sxint(:,i) is the solution at xint(i).
Note For multipoint boundary value problems, the solution obtained by bvp4c or bvp5c might be discontinuous at the interfaces. For an interface point xc, deval returns the average of the limits from the left and right of xc. To get the limit values, set the xint argument of deval to be slightly smaller or slightly larger than xc.
This example solves the system y′ = vdp1(t,y) using ode45, and evaluates and plots the first component of the solution at 100 points in the interval [0,20].
sol = ode45(@vdp1,[0 20],[2 0]); x = linspace(0,20,100); y = deval(sol,x,1); plot(x,y);