MATLAB: Defining and plotting a piecewise function

Question

Hi everybody!

I am trying to deifne and plot the function below in matlab, without success. Can anybody point how I could plot this function?

for 0 <= T < Tb, Se(T) = ag*S*?*F0*[(T/Tb) + (1/?*F0)*(1 – T/Tb)]

for Tb <= T < Tc, Se(T) = ag*S*?*F0

for Tc <= T < Td, Se(T) = ag*S*?*F0*(Tc/T)

for Td <= T, Se(T) = ag*S*?*F0*(Tc*Td/(T^2))

Note: I have defined all values of ag, S, n, F0, Tb, Tc, Td in my code.

function S = f(T);

S=0;

if T >= 0 & T < Tb

S = ag*S*n*F0*[(T/Tb) + (1/n*F0)*(1 – T/Tb)];

elseif T >= Tb & T < Tc

S = ag*S*n*F0;

elseif T >= Tc & T < Td

S = ag*S*n*F0*(Tc/T);

else T>=Td

S = ag*S*n*F0*(Tc*Td/(T.^2));

end

end

Thanks!

Answer 1

Another option:

S = @(T) (ag*S*n*F0*((T/Tb) + (1/n*F0)*(1 - T/Tb))).*(T >= 0 & T < Tb) + (ag*S*n*F0).*(T >= Tb & T < Tc) + (ag*S*n*F0*(Tc*Td/(T.^2))).*(T >= Tc & T < Td);

If all the other values are scalars, that should work.

.