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).