Description |
FUNCTION Y = LOGB(X,B)
logb: Calculates the logarithm of x to user-specified base b.
USAGE: y = logb(x,b)
(A trivial but useful function for arbitrary-base log calculations.)
Arguments:
Y: the base 'b' logarithm of input x
B: The base of the logarithmic calculation (default, e). Note that if B is non-scalar, it must be the same size as X. In that case, the log transformation will be element-by-element.
Examples:
1) To calculate the base 5 logarithm of 3:
y = logb(3,5)
2) To calculate element-wise the log of a non-scalar input using different bases:
y = logb(magic(3),[1 2 3; 4 5 6; 7 8 9]);
See also: log, log10, log2 |