# of input

Model

R^2-

MSE (mm²)

Standard error (mm)

Training

Test

Training

Test

Training

Test

6

Penman

0.6506

0.6919

4.0659

3.0669

2.0164

1.7513

LMANN

0.6847

0.7277

3.4004

2.2731

1.8440

1.5077

RTANN

0.6785

0.7285

3.4674

2.2929

1.8621

1.5142

GRSA

0.6984

0.7318

3.2815

2.4415

1.8115

1.5625

3

LMANN

0.6827

0.7315

3.4426

2.2572

1.8554

1.5024

RTANN

0.6803

0.7324

3.4475

2.3209

1.8567

1.5235

GRSA

0.6868

0.7287

3.4044

2.3317

1.8451

1.5270