[R] Numbers with correct significant digits

[RMan54]

This, for example:

v  <- c(9.6996, 99.99)
formatC(v, digits=3, format="g")

shows:

" 9.7" " 100"

This is scientifically incorrect for the first number in the sense that I
like to show all 3 significant digits, including trailing zero's.
Is there a way that the first number would show as " 9.70"?

By the way, can't use format() since it applies the same numbers of digits
after the decimal point for all numbers in the vector.

Thanks,
Rene

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