Research Article
An Improved Metabolism Grey Model for Predicting Small Samples with a Singular Datum and Its Application to Sulfur Dioxide Emissions in China
Table 4
Fitting and prediction results based on the GM
.
| | Year | Actual data | Modeling data | Fitting and prediction values | Residual errors | Relative error (%) |
| | 2007 | 2468.1 | 2468.1 | 2468.1 | 0 | 0 | | 2008 | 2321.2 | 2321.2 | 2286.3 | −34.82 | −1.500 | | 2009 | 2214.4 | 2214.4 | 2251.5 | 37.10 | 1.6756 | | 2010 | 2185.1 | 2185.1 | 2217.1 | 32.06 | 1.4674 | | 2011 | 2217.9 | 2217.9 | 2183.3 | −34.55 | −1.5578 | | 2012 | 2117.6 | — | 2150.0 | 32.44 | 1.5322 | | 2013 | 2044.0 | — | 2117.2 | 73.25 | 3.5838 |
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