A Novel Method for Air Quality Data Imputation by Nuclear Norm Minimization

Table 3

Performance of different methods for 10% missing values.

Method		Mean	STD	value
SM	RMSE	22.77	0.92	9.75e − 13
	^2	0.8941	0.0083	7.98e − 13
NN	RMSE	21.11	1.16	5.00e − 10
	^2	0.9107	0.0097	1.14e − 09
GNNM	RMSE	19.12	0.99	7.52e − 08
	^2	0.9288	0.0081	5.92e − 07
LNNM	RMSE	15.24	0.90	—
	^2	0.9536	0.0058	—