Hello!
I need to get frequencies for a number of different symptoms experienced by patients in a data set. The problem is that they are all listed under the same variable: Symptoms and each column under it has a different string of letters depending on what the patient presented with.
Symptoms
C
C, A
W, A
C, W, A
W, R, V
I have been able to count the single letters but not all of the "C"'s "W"'s etc.
Is there an easy way to do this?
Thanks!
Here is one way:
data have; informat Symptoms $50.; input Symptoms &; cards; C C, A W, A C, W, A W, R, V ; data need; set have; _n_=1; do while (scan(Symptoms,_n_,',') ne ''); symptom=scan(Symptoms,_n_,','); output; _n_+1; end; run; proc freq data=need; tables symptom; run;
HTH,
Art, CEO, AnalystFinder.com
You need to loop over each individual symptom in symptons. Output each of the individuals, and then run proc freq:
data have;
input symptoms $8.;
datalines;
C
C, A
W, A
C, W, A
W, R, V
run;
data vhave/ view=vhave;
set have;
length symptom $1.;
do I=1 to countw(symptoms,',');
symptom= left(scan(symptoms,I,','));
output;
end;
run;
proc freq data=vhave;
tables symptom;
run;
Better post the output you need too .
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