奇怪的故障

findFn 函数(库 sos

library (sos)

findFn("randomization test")
# in both finds 72 results

findFn("{randomization test}")
# In XP finds 19 or about so, but in Vista whenever I use {} and more than one word inside, 
# I keep getting the following:

found 0 matches
x has zero rows;  nothing to display.
Warning message:
In findFn("{randomization test}") :
  HIT not found in HTML;  processing one page only.

R ver=2.10.1,更新包。 你知道问题出在哪里吗?

奖励:很明显,我在寻找关于 tests for randomized experiments