https://communities.sas.com/t5/SAS-Programming/Gompertz-curve-modelling-using-NLIN-PROC/m-p/926128#M364428 Check <a href="https://communities.sas.com/t5/user/viewprofilepage/user-id/13684">@Rick_SAS</a> blogs:<BR /><A href="https://blogs.sas.com/content/iml/2018/10/10/fit-growth-curve-sas.html" target="_blank">https://blogs.sas.com/content/iml/2018/10/10/fit-growth-curve-sas.html</A> Sat, 27 Apr 2024 06:08:22 GMT Ksharp 2024-04-27T06:08:22Z https://communities.sas.com/t5/SAS-Programming/Gompertz-curve-modelling-using-NLIN-PROC/m-p/926113#M364416 <P>I want to use the Gompertz curve model to develop a growth curve and also get the analysis components. the model that i want to use is :</P><P><SPAN>BWt = BW0 * exp*(L/K(1 - exp(-Kt))).&nbsp;</SPAN></P><P><SPAN>The equation includes parameters such as BWt (recorded body weight at age t), BW0 (estimated weight at hatching), L (initial specific growth rate), and K (maturation rate or exponential factor of decay of the specific growth rate).</SPAN></P><P>&nbsp;</P><P><SPAN>how can i go about developing the code.</SPAN></P><P>&nbsp;</P><P>line in the data stands from the animal breed in other terms. this is a sample of the data set. otherwise, the data set is huge.</P><P>&nbsp;</P><TABLE><TBODY><TR><TD>LINE</TD><TD>BW0</TD><TD>WEEK</TD><TD>BWT</TD></TR><TR><TD>F01</TD><TD>39.0</TD><TD>2</TD><TD>153.6</TD></TR><TR><TD>F01</TD><TD>39.0</TD><TD>2</TD><TD>128.4</TD></TR><TR><TD>F01</TD><TD>37.0</TD><TD>2</TD><TD>143.2</TD></TR><TR><TD>F01</TD><TD>31.8</TD><TD>2</TD><TD>107.0</TD></TR><TR><TD>F01</TD><TD>32.6</TD><TD>2</TD><TD>144.6</TD></TR><TR><TD>F01</TD><TD>32.4</TD><TD>2</TD><TD>117.2</TD></TR><TR><TD>F01</TD><TD>35.6</TD><TD>2</TD><TD>154.2</TD></TR><TR><TD>F01</TD><TD>37.4</TD><TD>2</TD><TD>.</TD></TR><TR><TD>F01</TD><TD>33.4</TD><TD>2</TD><TD>66.6</TD></TR><TR><TD>F01</TD><TD>32.0</TD><TD>2</TD><TD>92.6</TD></TR><TR><TD>F01</TD><TD>37.6</TD><TD>2</TD><TD>154.0</TD></TR><TR><TD>F01</TD><TD>34.8</TD><TD>2</TD><TD>125.6</TD></TR><TR><TD>F01</TD><TD>34.4</TD><TD>2</TD><TD>113.8</TD></TR><TR><TD>F01</TD><TD>37.2</TD><TD>2</TD><TD>146.8</TD></TR></TBODY></TABLE> Fri, 26 Apr 2024 23:47:04 GMT https://communities.sas.com/t5/SAS-Programming/Gompertz-curve-modelling-using-NLIN-PROC/m-p/926113#M364416 samkelomotsa 2024-04-26T23:47:04Z https://communities.sas.com/t5/SAS-Programming/Gompertz-curve-modelling-using-NLIN-PROC/m-p/926128#M364428 Check <a href="https://communities.sas.com/t5/user/viewprofilepage/user-id/13684">@Rick_SAS</a> blogs:<BR /><A href="https://blogs.sas.com/content/iml/2018/10/10/fit-growth-curve-sas.html" target="_blank">https://blogs.sas.com/content/iml/2018/10/10/fit-growth-curve-sas.html</A> Sat, 27 Apr 2024 06:08:22 GMT https://communities.sas.com/t5/SAS-Programming/Gompertz-curve-modelling-using-NLIN-PROC/m-p/926128#M364428 Ksharp 2024-04-27T06:08:22Z