Estimate Margules model parameters using data regression

30 Apr 2020
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Updated 30 Apr 2020
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I am trying to construct a matrix of modeling functions and the right hand side by concatenating the two equations: Ln(gamma1) = [A12 + 2*(A21-A12)*x1]*x2^2 and Ln(gamma2) = [A21 + 2*(A12-A21)*x2]*x1^2. Then do regression to determine the fitting parameters and plot it up. In line 12 (x=k*y), I keep getting [NaN,NaN]' as my answer. Any suggestions to rectify this issue? I am attaching my solution and the original problem. Thanks!
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Asked:

Ariel Scott
Ariel Scott
on 30 Apr 2020

Edited:

Ariel Scott
Ariel Scott
on 30 Apr 2020

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