I am in need to calculate the initial and final NLLS of ai, bi, ci. With this I have the initial estimates of ai, bi, ci. I aware that the following equations would help to calculate the initial and final NLLS . However, I am struggling to write the SAS code through PROC NLIN. I would be much thankful, if anyone may help to write the SAS Code PROC NLIN. Equation : yi = ai exp(-bi(x-ci)^2) yi = 0.31, ai = 37, bi=3900.19, ci=0.314, x=0.291
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