Ode23 error using odearguments

Hello,

I am trying to run a code found on web (linked below) and I am encountering a problem with ODE23 function:

Code:

%% Numerical Solution for 2 Element WM
t=(n-1)*Tc :.01: n*Tc ;
I = @ ( t ) I0* sine ( t-(n-1)*Tc ) .* ( t <= (( n-1)*Tc+Ts )) ;
Y2= @ ( t , y2 ) (-y2 / ( R*C )+I ( t ) /C ) ;
[t_m2 , P_m2 ] = ode23 (Y2, [(n-1)*Tc; n*Tc], P_ss2 ) ;
P_ss2=P_m2 ( end ) ;
subplot (4,1,3)
hold on
plot ( t_m2 , P_m2)
ylim ([ 0 150])
xlim ([0 cycle *Tc ] )
title ( ' Aortic Blood Pressure ( Numerical Analysis  2 Element WM) ' )
ylabel ( ' Pressure (mmHg) ' )
xlabel ( ' time ( s ) ' )

Errors:

Error using odearguments

Inputs must be floats, namely single or double.

Error in ode23 (line 106)

odearguments(odeIsFuncHandle, odeTreatAsMFile, solver_name, ode, tspan, y0, options, varargin);

Error in prject1 (line 68)

[t_m2 , P_m2 ] = ode23 (Y2, [(n-1)*Tc; n*Tc], P_ss2 ) ;

Thank you for all help in advence

Used code does not belong to me, I found it here: https://isn.ucsd.edu/courses/beng221/problems/2012/BENG221_Project%20-%20Catanho%20Sinha%20Vijayan.pdf

Answer 1

[Walter Roberson]

I0=subs ( I0 , ' 3.14 ' , pi ) ;

After that add

IO = double(IO);

[Justyna Hodurek]

Thank you kindly Sir, everything works splendid now. Thank you!