[R] What's ``impres''?

[Jinsong Zhao]

Dear all,

In one S+ program, I found the following code. 

if (impres) cat("blah blah blah \n")

Would someone here like to tell me what's the counterpart in R to
impres in S+?

Thanks in advance!

Best wishes,

Jinsong

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(Mr.) Jinsong Zhao
Ph.D. Candidate
School of the Environment
Nanjing University
22 Hankou Road, Nanjing 210093
P.R. China
E-mail: jinsong_zh at yahoo.com