The objective of this first analysis of forest data is to study the relationships between variables between plots and within plots. The two datasets (Sesnie and CATIE) were analysed independently of each other because all information are not equal for both dataset. The aim was to study whether forest type and soil type have an impact on diversity and biomass (AGB). For this purpose, statistical analysis were carried out. The results are presented in the document below, to which is attached the R script that allowed the analysis to be carried out