MATLAB®

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, reallog

loadobj

log10

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