Neural Models for Imputation of Missing Ozone Data in Air-Quality Datasets

Table 1

Correlation matrix of the six variables in the dataset.

	O3	CO	NO	NO2	PM10	SO2
O3	1.000	−0.123	−0.161	−0.202	0.072	−0.013
CO	−0.123	1.000	0.360	0.412	0.358	0.299
NO	−0.161	0.360	1.000	0.540	0.233	0.330
NO2	−0.202	0.412	0.540	1.000	0.330	0.257
PM10	0.072	0.358	0.233	0.330	1.000	0.251
SO2	−0.013	0.299	0.330	0.257	0.251	1.000