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| author | Georg Brandl <georg@python.org> | 2009-09-01 07:53:37 (GMT) |
|---|---|---|
| committer | Georg Brandl <georg@python.org> | 2009-09-01 07:53:37 (GMT) |
| commit | 018ad1c949d15152e00b714fa020a798ba16c574 (patch) | |
| tree | 7637a5dcaba4d5334e4478d18eaf1a41ea424011 | |
| parent | a88fd7603b35e5a7324f0eb9b49bd32feda4b2a7 (diff) | |
| download | cpython-018ad1c949d15152e00b714fa020a798ba16c574.zip cpython-018ad1c949d15152e00b714fa020a798ba16c574.tar.gz cpython-018ad1c949d15152e00b714fa020a798ba16c574.tar.bz2 | |
#6765: hint that log(x, base) is not very sophisticated.
| -rw-r--r-- | Doc/library/math.rst | 9 |
1 files changed, 6 insertions, 3 deletions
diff --git a/Doc/library/math.rst b/Doc/library/math.rst index 4d566a5..96ea91a 100644 --- a/Doc/library/math.rst +++ b/Doc/library/math.rst @@ -166,8 +166,10 @@ Power and logarithmic functions .. function:: log(x[, base]) - Return the logarithm of *x* to the given *base*. If the *base* is not specified, - return the natural logarithm of *x* (that is, the logarithm to base *e*). + With one argument, return the natural logarithm of *x* (to base *e*). + + With two arguments, return the logarithm of *x* to the given *base*, + calculated as ``log(x)/log(base)``. .. versionchanged:: 2.3 *base* argument added. @@ -183,7 +185,8 @@ Power and logarithmic functions .. function:: log10(x) - Return the base-10 logarithm of *x*. + Return the base-10 logarithm of *x*. This is usually more accurate + than ``log(x, 10)``. .. function:: pow(x, y) |