Table 1.
Example factor tablea
CompoundFactor 1Factor 2Factor 3Factor 4Factor 5
NOx 0.687       
ethane 0.911 0.286   
propane 0.930 0.271   
n-butane 0.951 0.244   
isobutane 0.947 0.226     
n-pentane 0.958 0.238     
isopentane 0.937 0.298       
n-hexane 0.946 0.246       
n-heptane 0.868 0.292   0.353 
n-octane 0.879 0.309   0.250 
n-nonane 0.819 0.387     0.205 
n-decane 0.741 0.400   
methylhexanes 0.734 0.376 0.506   
dimethylbutane 0.844 0.334       
dimethylpentanes 0.615 0.548 0.392   
cyclopentane 0.895 0.315   
cyclohexane 0.929 0.252   
methylcyclopentane 0.885 0.355 
methylcyclohexane 0.923 0.277   
ethene 0.362 0.849 0.244     
propene 0.611 0.672 0.220     
1-butene 0.891     
1-pentene 0.824     
acetylene 0.276 0.763 0.260     
benzene 0.684 0.565 0.202   
toluene 0.545 0.734     
m/p-xylene 0.543 0.759 -0.239   
o-xylene 0.448 0.834 -0.204   
ethylbenzene 0.453 0.777   0.233 
styrene 0.227 0.590     
trimethylbenzenes 0.477 0.754 -0.212   
isoprene   -0.204     
butadiene   0.876     
sum square loadings 16.261 9.999 0.723 0.649 0.570 
prop. variability 0.493 0.303 0.022 0.020 0.017 
cum. variability 0.493 0.796 0.818 0.837 0.855 
CompoundFactor 1Factor 2Factor 3Factor 4Factor 5
NOx 0.687       
ethane 0.911 0.286   
propane 0.930 0.271   
n-butane 0.951 0.244   
isobutane 0.947 0.226     
n-pentane 0.958 0.238     
isopentane 0.937 0.298       
n-hexane 0.946 0.246       
n-heptane 0.868 0.292   0.353 
n-octane 0.879 0.309   0.250 
n-nonane 0.819 0.387     0.205 
n-decane 0.741 0.400   
methylhexanes 0.734 0.376 0.506   
dimethylbutane 0.844 0.334       
dimethylpentanes 0.615 0.548 0.392   
cyclopentane 0.895 0.315   
cyclohexane 0.929 0.252   
methylcyclopentane 0.885 0.355 
methylcyclohexane 0.923 0.277   
ethene 0.362 0.849 0.244     
propene 0.611 0.672 0.220     
1-butene 0.891     
1-pentene 0.824     
acetylene 0.276 0.763 0.260     
benzene 0.684 0.565 0.202   
toluene 0.545 0.734     
m/p-xylene 0.543 0.759 -0.239   
o-xylene 0.448 0.834 -0.204   
ethylbenzene 0.453 0.777   0.233 
styrene 0.227 0.590     
trimethylbenzenes 0.477 0.754 -0.212   
isoprene   -0.204     
butadiene   0.876     
sum square loadings 16.261 9.999 0.723 0.649 0.570 
prop. variability 0.493 0.303 0.022 0.020 0.017 
cum. variability 0.493 0.796 0.818 0.837 0.855 

a Only absolute loadings larger than 0.2 are shown; absolute loadings less than 0.1 were discarded, while those between 0.1 and 0.2 are indicated by an asterisk.

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