Exhaust Emissions Data

The following steps display information about the data set Sashelp.Gas and create Figure B.5:

 
title 'Exhaust Emissions Data';
proc contents data=sashelp.gas varnum; 
   ods select position; 
run;

title 'The First Five Observations Out of 171';
proc print data=sashelp.gas(obs=5); 
run;

title 'The Fuel Type Variable';
proc freq data=sashelp.gas; 
   tables fuel; 
run;

Figure B.5 Exhaust Emissions Data

Variables in Creation Order
#	Variable	Type	Len	Label
1	Fuel	Char	8
2	CpRatio	Num	8	Compression Ratio
3	EqRatio	Num	8	Equivalence Ratio
4	NOx	Num	8	Nitrogen Oxide

The First Five Observations Out of 171

Obs	Fuel	CpRatio	EqRatio	NOx
1	Ethanol	12	0.907	3.741
2	Ethanol	12	0.761	2.295
3	Ethanol	12	1.108	1.498
4	Ethanol	12	1.016	2.881
5	Ethanol	12	1.189	0.760

The Fuel Type Variable

Fuel	Frequency	Percent	Cumulative Frequency	Cumulative Percent
82rongas	9	5.26	9	5.26
94%Eth	25	14.62	34	19.88
Ethanol	90	52.63	124	72.51
Gasohol	13	7.60	137	80.12
Indolene	22	12.87	159	92.98
Methanol	12	7.02	171	100.00