[R] extracting values from txt with regular expression

[emorway]

Hi Dan and Rui,  Thank you for the suggestions, both were very helpful. 
Rui's code was quite fast...there is one more thing I want to explore for my
own edification, but first I need some help fixing the code below, which is
a slight modification to Dan's suggestion.  It'll no doubt be tough to beat
the time Rui's code finished the task in, but I'm willing to try.  First, I
need to fix the following, which 'peels' the wrong bit of text from
"txt_line".  Instead of extracting as it now does (shown below), can the
code be modified to extract the values 0.01 and -0.05, and store them in the
variable 'extracted'?

txt_line<-" PERCENT DISCREPANCY =           0.01     PERCENT DISCREPANCY =         
-0.05"
extracted <- 
strsplit(gsub("[+-]?(?:\\d+(?:\\.\\d*)|\\.\\d+)(?:[eE][+-]?\\d+)?","\\1%&",txt_line),"%&") 
extracted
#[1] " PERCENT DISCREPANCY =           "    "     PERCENT DISCREPANCY =         
"



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