log

Description

The log function operates element-wise on arrays. Its domain includes complex and negative numbers, which may lead to unexpected results if used unintentionally.

Y = log(X) returns the natural logarithm of the elements of X. For complex or negative z where z = x + y*i, the complex logarithm is returned.

log(z) = log(abs(z)) + i*atan2(y,x)

Examples

The statement abs(log(-1)) is a clever way to generate π.

ans =

    3.1416