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. 2019 Jul 25;19(15):3277. doi: 10.3390/s19153277

Table 2.

The results of the particle swarm optimization–support vector regression (PSO-SVR) model for elements N, P, K.

Element t/s R2C RMSEC R2P RMSEP
N 2.98 0.930 0.0996 0.923 0.0952
P 3.31 0.980 0.0701 0.964 0.0677
K 4.32 0.979 0.0894 0.952 0.0921