Attempted to access v(0); index must be a positive integer or logical.

clear all, close all, clc;
wetf=@(t,v) -32.2+(((4/15)*(v(t))^2)/(150/32.2));
timerange=[0:30];
initialv=0;
[t1,v1]=ode45(wetf,timerange,initialv)
plot(t1,v1)

I get these errors

Attempted to access v(0); index must be a positive integer or logical.

Error in @(t,v)-32.2+(((4/15)*(v(t))^2)/(150/32.2))

Error in odearguments (line 87)
f0 = feval(ode,t0,y0,args{:});   % ODE15I sets args{1} to yp0.

Error in ode45 (line 113)
[neq, tspan, ntspan, next, t0, tfinal, tdir, y0, f0, odeArgs, odeFcn, ...

Error in stuffthings (line 5)
[t1,v1]=ode45(wetf,timerange,initialv)

HELP!

Answer 1

[Star Strider]

Your dependent variable is implicitly a function of your independent variable as far as ode45 and its friends are concerned.

Change your function to:

wetf=@(t,v) -32.2 + (4/15).*(v.^2)/(150/32.2);

and your code works.