A procedure to quantify the feed intake response of growing pigs to perturbations

This is the R code of the data analysis and modelling procedure to quantify the feed intake response of growing pigs to perturbations. The procedure includes four steps: (1) treatment of missing data; (2) estimation of the target trajectory of cumulative feed intake; (3) detection of perturbations based on the differences between observed feed intake and its target and (4) characterization and quantification of animal's response to perturbations. For detail description of the procedure please search for the article with the same title.