Stata 15 help for ln()

[FN] Mathematical functions

Function

ln(x) Description: the natural logarithm, ln(x)

This function is the inverse of exp(x). To compute ln(1-x) and ln(1+x) with high precision for small values of |x|, use ln1m(x) and ln1p(x), respectively. Domain: 1e-323 to 8e+307 Range: -744 to 709


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