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Table 4 List of basis functions of the B-MARS and their coefficients for dynamometer testing

From: Multivariate adaptive regression splines models for vehicular emission prediction

Beta Basis Value
factor function  
BF0   0.231567
BF1 Max(0, SPEED-7.11) –0.000134
BF2 Max(0, SPEED-11.42) 0.000514
BF3 Max(0, SPEED-20.16) 0.004671
BF4 Max(0, SPEED-26.11) 0.051411
BF5 Max(0, ACCEL-1.23) 0.009671
BF6 Max(0, ACCEL-5.78) 0.032143
BF7 Max(0, AMBT -22.14) 0.000221
BF8 Max(0, AMBT -23.63) 0.003133
BF9 Max(0, AMBT -25.31) 0.028912
BF10 Max(0, LOAD -14.41) 0.012761
BF11 Max(0, LOAD -44.23) 0.041671
BF12 Max(0, Power -15.72) 0.015116
BF13 Max(0, Power -21.43) 0.021551