/* DATA INPUT SOURCES */

/* Raw data may be read into SAS from external files,
    including over the internet,
	or they may be included in the SAS command file.  */

* In line data;
* from SAS Language Reference: Concepts;

data weight;
   input PatientID $ Week1 Week8 Week16;
   loss=Week1-Week16;
   datalines;
2477 195 177 163
2431 220 213 198
2456 173 166 155
2412 135 125 116
;

proc means data=weight; 
run;

* From an external file;

data weight2;
   infile "y:\sas\text data\weight.dat";
   input PatientID $ Week1 Week8 Week16;
   loss=Week1-Week16;
   run;

proc means data=weight2 maxdec=2; 
run;

* From a file via the internet;

filename w3 url "http://www.ssc.wisc.edu/~hemken/SASworkshops/data/weight.dat";

data weight3;
   infile w3;
   input PatientID $ Week1 Week8 Week16;
   loss=Week1-Week16;
   run;

proc means data=weight3 maxdec=2 n mean lclm uclm; 
run;