Predictors model parameters

Target variable (element content in moss samples)


ln Cd

In Cu

ln Hg

In Ni

In Pb

ln Zn

N


N

400

400

400

400

400

400

400

ntree

500

500

500

500

500

500

500

mtry

3

4

3

3

3

2

3

Model quality indices

MSE

0.1882

0.0774

0.1878

0.2239

0.2617

0.077

0.0992

RSQ

30.70

41.62

19.83

34.50

21.99

38.71

50.18

 ln logtransformed values, n sample size, ntree number of regression trees in the random forest model, mtry number of variables used for each split, MSE mean squared residuals, RSQ share of explained variance