reading program

[mei]

I have the following prog:

data out.idiorisk;

set main2;

if numobs>=200;

if idiiorisk ^= .;

run;

what does idiorisk^= .; mean?

(for your info idiorisk = log ((1-_rsq_)/_rsq_) (rsq=r square))

thanks

mei

[Linlin · Accepted solution]

if   idiiorisk is not missing

[manojinpec]

it means if idiiorisk is not equal to .(dot) since numeric field in sas is represented as dot for missing value