Figure 7
The horizontal axis represents Real Value in watts per metre, and the vertical axis represents Predicted Value in watts per metre. Each panel includes a diagonal line for equal real and predicted values. On Day 1, both axes range from 0 to 300 watts per metre. R squared is 0.989, mean absolute error is 5.17 watts per metre, root mean squared error is 7.83 watts per metre and mean relative error is 4.82 per cent. On Day 30, both axes range from 0 to 120 watts per metre. R squared is 0.994, mean absolute error is 1.79 watts per metre, root mean squared error is 2.57 watts per metre and mean relative error is 3.24 per cent. On Day 360, both axes range from 0 to 100 watts per metre. R squared is 0.990, mean absolute error is 1.57 watts per metre, root mean squared error is 2.41 watts per metre and mean relative error is 3.46 per cent. The points remain close to the diagonal line in all three panels.Surrogate test set predictions after 1, 30 and 360 days of continuous operation