This is likely yet another instance of round off error, but it caught me by 
surprise.

tmt% R --vanilla
 (headers skipped, version 3.0.2 on Linux)

load('qtest.rda')
length(temp)
[1] 3622
max(temp) >= quantile(temp, .98)
  98%
FALSE

I can send the file to anyone who would like to understand this more deeply.
The top 3% of the vector is a single repeated value.

Terry Therneau

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