Starting diary file "diary-2016-02-29.txt" on Mon Feb 29 2016 12:25 PM.

help ode23
 ODE23  Solve non-stiff differential equations, low order method.
    [TOUT,YOUT] = ODE23(ODEFUN,TSPAN,Y0) with TSPAN = [T0 TFINAL] integrates 
    the system of differential equations y' = f(t,y) from time T0 to TFINAL 
    with initial conditions Y0. ODEFUN is a function handle. 
    ...
    
doc ode23

odeset
          AbsTol: [ positive scalar or vector {1e-6} ]
          RelTol: [ positive scalar {1e-3} ]
     NormControl: [ on | {off} ]
     NonNegative: [ vector of integers ]
       OutputFcn: [ function_handle ]
       OutputSel: [ vector of integers ]
          Refine: [ positive integer ]
           Stats: [ on | {off} ]
     InitialStep: [ positive scalar ]
         MaxStep: [ positive scalar ]
             BDF: [ on | {off} ]
        MaxOrder: [ 1 | 2 | 3 | 4 | {5} ]
        Jacobian: [ matrix | function_handle ]
        JPattern: [ sparse matrix ]
      Vectorized: [ on | {off} ]
            Mass: [ matrix | function_handle ]
MStateDependence: [ none | {weak} | strong ]
       MvPattern: [ sparse matrix ]
    MassSingular: [ yes | no | {maybe} ]
    InitialSlope: [ vector ]
          Events: [ function_handle ]

help odeset
 ODESET Create/alter ODE OPTIONS structure.
    ...

edit fallingf
ode23(@fallingf,[0 10], [100; 0])

opt = odeset('events',@stopper)
opt = 
              AbsTol: []
                 BDF: []
              Events: @stopper
         InitialStep: []
            Jacobian: []
           JConstant: []
            JPattern: []
                Mass: []
        MassConstant: []
        MassSingular: []
            MaxOrder: []
             MaxStep: []
         NonNegative: []
         NormControl: []
           OutputFcn: []
           OutputSel: []
              Refine: []
              RelTol: []
               Stats: []
          Vectorized: []
    MStateDependence: []
           MvPattern: []
        InitialSlope: []

ode23(@fallingf,[0 10], [100; 0], opt)

[T,Y] = ode23(@fallingf,[0 10], [100; 0], opt);

T
T =
         0
    0.0000
    0.0000
    ...
    4.8151
    5.2944

edit stopper

diffusion
{??? Undefined function or variable 'implicit_method'.}

implicit_method = 1;
diffusion