log

Natural Log

Usage

log(A)

• A should be a numeric array.
• It returns an array containing the natural logarithm (base $e$) of each element of A.
• The output has the same size as A.
• log(a) may be a complex number if a is complex or a negative real number.

Example

• Natural logarithms of random numbers and some special numbers.

Input

% Returning complex numbers.
log([-inf rand + rand*i -rand])
% Returning real numbers.
log([inf nan 0 rand])

Output

ans = 
 Inf    + 3.1416i  -0.2468 + 1.2912i  -0.9082 + 3.1416i

ans = 1e-1 × 
 Inf      NaN     -Inf     -5.6703