[R] Rounding a Measurement to be Consistent with its Uncertainty

[Tom La Bone]

I have a measurement of 8165.666 and an uncertainty of 338.9741 (the units of
both are unimportant). I can easily round the uncertainty to two significant
digits with signif(338.9741,2), which gives 340. Is there a function in R
that will take 8165.666 and round it to be consistent with its uncertainty,
i.e., 8170?

Tom
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