I'm no expert in R internals or floating point computation, however, two things
come to mind.
First, I suspect the exact value is stored. It is just the printing that looks
rounded. That is likely because 0.001 completely dominates the rest. To print
in full precision, you would need over 200 d
"Is there any way ..."
Two quick answers:
1. using base R functions and data types the answer is 'no' - a double
(i.e. numeric) contains about 15 significant digits.
So 5.678e-100 is fine but 0.01 + 5.678e-100 will keep the
.0100 as the significant digits and "drop" the digits 80
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