How to plot variable against time

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Hi,

I want to plot angular velocity against time, I have used linspace to increment the time. For the function to calculate angular velocity i have used function1-w. the graph is returning a blank plot. I am unsure how to plot how the angular velocity as it changes at different times. I have included the code below. Any help would be greatly appreciated.

T = input('Please enter the time period of the plunger(s)');
%Graph for angular Velocity
for t = 0:0.01:T
    function1 = (((2*t).*T)/2.*T);
    function2 = (function1.*pi);
    function3 = ((pi.*B0)/T);
    w = (function3.*(cos(function2)));
   
    plot(w,t)
end 