derivative plot of function

function y=f(p,t)
ea=2.25;

em=0.15+1i*3.2;
theta=1:15;
x=1.5*sin(theta);
ka=sqrt(ea-x.^2);
km=sqrt(em-x.^2);

y=2.*atan(1i.*(1-exp(2*1i.*km.*p))./(1+exp(2*1i.*km.*p)))-2.*atan(1i.*exp(2*1i.*ka.*t)./(1+exp(2*1i.*ka.*t)));
end

when we take p=1:15

plot dy/dt vs p and plot dy/dt /dy/dp vs p

[Geoff Hayes]

@shiv gaur - please clarify your question. Are you asking how to determine the derivative of the function with respect to t?

[shiv gaur]

yes