Figure 9
The line graph consists of a horizontal axis which is labeled from left to right as follows: “January-2009”, “June-2009”, “November-2009”, “April-2010”, “September-2010”, “February-2011”, “July-2011”, “December-2011”, “May-2012”, “October-2012”, “March-2013”, “August-2013”, “January-2014”, “June-2014”, “November-2014”, “April-2015”, “September-2015”, “February-2016”, “July-2016”, “December-2016”, “May-2017”, “October-2017”, “March-2018”, “August-2018”, “January-2019”, “June-2019”, “November-2019”, “April-2020”. The vertical axis on the left is labeled “dollar per ton”, and from bottom to top, the markings are as follows: “negative 200”, “200”, “600”, “1000”. The legend at the top includes five lines: a thick black line for “Target”, an orange line for “Holdout underscore 24 features”, a grey line for “Holdout underscore 6 features”, a yellow line for “Holdout underscore 3 features”, and a blue line for “A R I M A X (1, 1, 1)”. A horizontal line passes through (January-2009, 0) and extends across the graph to (April-2020, 0). The data from the graph is as follows: The black line labeled “Target” begins at (January-2009, 210), passes through several points with minor fluctuations, peaks at (May-2012, 705), and then declines to a sharp dip at (February-2016, 120) following a downward trend and then terminates at (April-2020, 160). The orange line labeled “Holdout underscore 24 features” begins at (January-2009, 300), passes through several points following a similar trajectory to the black line but with fewer fluctuations, peaks at (May-2012, 580), and then declines to a dip at (February-2016, 280) and then terminates at (April-2020, 270). The grey line labeled “Holdout underscore 6 features” begins at (January-2009, 220), passes through several points closely overlapping with the yellow and blue lines, peaks at (May-2012, 680), and then declines to a dip at (February-2016, 150) and then terminates at (April-2020, 180). The yellow line labeled “Holdout underscore 3 features” begins at (January-2009, 215), passes through several points, peaks at (May-2012, 690), and then declines to a dip at (February-2016, 140) and then terminates at (April-2020, 175). The blue line labeled “A R I M A X (1, 1, 1)” begins at (January-2009, 210), passes through several points mirroring the “Target” line closely, peaks at (May-2012, 695), and then declines to a dip at (February-2016, 130) following a downward trend and then terminates at (April-2020, 165). Note: All the numerical data values are approximated.Training results for each model. Source: Authors