2.4 Multivariate Regression Models
Regression analysis was done in R software and a number of regression models such as Partial Least Square Regression (PLSR) , Random Forest Regression (RF) , Support Vector Regression (SVR) , Multivariate Adaptive Regression Splines (MARS) were analysed using different R package ‘pls’, ‘randomForest’, ‘kernlab’ and ‘earth, plotmo, plotrix, TeachingDemos’ (Clyde et al., 2017), for PLSR, RF, SVR and MARS respectively of R 3.3.3 (The R Development Core Team, 2017).