Table 3: Basis functions and important explanatory variables for the MARS model with .

FunctionStd. dev.Cost of omissionNumber of BFVariable Relative importance (%)

10.5011.0701 100.000
20.5001.0653 98.993
30.3390.9631 70.614
40.3320.9571 68.366
50.1310.8731 26.827
60.1040.8671 20.879
70.0990.8661 19.621
80.0930.8651 18.071