Table 4 Tools used for this study.

From: Forecasting of energy consumption by G20 countries using an adjacent accumulation grey model

Softwares

Purpose

MS Excel 2016

To analyze the results and get the values

MATLAB

To verify and analyze the results

Microsoft Excel Solver

To perform the Generalized Reduced Gradient (GRG) nonlinear method for optimization

Origin Lab

To plot the graphs and figures