Table 3 SVM and RF hyperparameter grid search range.

From: Spatial heterogeneity of heavy metals in contaminated soil using hyperspectral inversion models: a case study of Dongting lake region, south-central China

Models

Hyperparameter

Search range

PLSR

n_components

1–32

SVM

kernel

RBF

C

0.001, 0.01, 0.1, 1–200

gamma

0.001, 0.01, 0.1, 1–200

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