ode45 command syntax error

I am trying to use ode45 to plot this differential (dy/dx)= -0.00043y with this intial condition y(0)=1 on the interval [0 30000]. I tried to use this code but I just get the following error message.

[x5,y5]=ode45(@(y) -0.00043*y ,[0 30000],1)

Error using HW07Prob2>@(y)-0.00043*y

Too many input arguments.

Error in odearguments (line 90)

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

Error in ode45 (line 115)

odearguments(FcnHandlesUsed, solver_name, ode, tspan, y0, options, varargin);

Error in HW07Prob2 (line 10)

[x5,y5]=ode45(@(y) -0.00043*y ,[0 30000],1);

Can someone help me figure out what I am doing wrong?

Answer 1

[Walter Roberson]

Your ode anonymous function must accept both y and y. @(t,y). You do not need to pass t into your actual function.

[Thomas Holmes]

Thank you, I realized this shortly after posting.