MATLAB Function Reference

log

Natural logarithm

Syntax

• Y = log(X)
  

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 , where , 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 .

• ans =
  
      3.1416
  

See Also

exp, log10, log2, logm

load (serial)

log10