How to do an inverse log transformation in R?

Question

I am familiar with regular log transformations:

DF1$RT <- log(DF1$RT)

How do I perform an inverse log transformation in R?

do you want `exp` (or more generally base^log(x, base=base)`) — user20650, Dec 24 '18 at 12:05

G. Grothendieck · Answer 1 · 2023-06-06T20:57:37.053

The term inverse can be used with different meanings. The meanings are:

reciprocal. In the case of reciprocal (also known as the multiplicative inverse) the inverse of log(x) is 1/log(x)
inverse function. In the case of an inverse function it refers to solving the equation log(y) = x for y in which case the inverse transformation is exp(x) assuming the log is base e. (In general, the solution is b^x if the log is of base b. For example, if log10(y) = x then the inverse transformation is 10^x.)

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