Hello guys, How do I generate the parameters k and a in SAS for the fit of the lactation curve in beef cows, using the equation proposed by Jenkins and Ferrell (1984) Yn = n / aekn. Thank you. A sample of the data to be analyzed are: # cow Milk, kg days 1 7.44 40 1 7.92 68 1 9.00 96 1 6.60 124 1 3.60 152 1 2.40 180 2 3.12 105 2 3.84 155 2 3.00 183 2 2.40 248 3 2.52 61 3 2.64 96 3 1.44 124 3 1.20 159 3 0.72 194 4 1.68 44 4 2.76 72 4 3.60 100 4 0.48 128 4 1.44 156 4 0.96 184 5 5.76 86 5 2.88 121 5 2.40 149 5 3.00 184 5 2.40 219 6 3.48 56 6 2.16 88 6 2.16 112 6 1.68 140 6 0.72 164 6 2.64 196 ... View more