I have two equation from two models and I want to plot those. I am attaching the equation and expected plot of the equations. How to select data range to get the curve. I tried x=(1:20); A=(x./max(x)); C=(A).^2; for i=1:20 D(i)=[1.2254*(1./A(i))*[1-exp(-2.3367.*C(i))]^2]; end plot (C,D)

but this method will not give the particular curve I want as with increase in X, D will also increase. Here is the link from where equation and curve shape can be downloaded