log2

Log of Base 2

Usage

log2(A)

• A should be a numeric array.
• It returns an array containing the logarithm (base 2) of each element of A.
• The output has the same size as A.
• log2(a) may be a complex number when a is complex or a negative real number.

Example

• Base-2 logarithms of random numbers and some special numbers.

Input

% Returning complex numbers.
log2([-inf rand + rand*i -rand])
% Returning real numbers.
log2([inf nan 0 rand])

Output

ans = 
 Inf    + 4.5324i   0.2044 + 0.7616i  -1.6523 + 4.5324i

ans = 1e-2 × 
 Inf      NaN     -Inf     -2.8720