You could use:
tx = 40 * 10^-10;
ex = 3.45*10^-13;
on = 180;
Vn = 0.25;
WLn = 0.12/1.4;
B = (on * (ex/tx)*WLn);
r = @(Vsn) B*(1.2 - Vn - (Vsn/2)).*Vsn;
fplot(r)
The above can be used as a script file.
Any variable that you define in a function only exists while the function is executing.
You were not executing the function named In at all.
Also, your function used values that were defined in the script and not passed into the function.
You could also have used
function my_first_plot
tx = 40 * 10^-10;
ex = 3.45*10^-13;
on = 180;
Vn = 0.25;
WLn = 0.12/1.4;
fplot(@In)
function r = In(Vsn)
r = B*(1.2 - Vn - (Vsn/2))*Vsn
end
end
This is a more advanced program that shares variables with a nested function.
