how to write log base 2 in matlab coding

expression for log base 2 in matlab coding

Answer 1

[michio]

Y = log2(X)

Answer 2

[Andrew Rockhill]

To find the log in any base, make use of the base-change formula:

log_b(x) = log_a(x)/log_a(b)

So you can create a function logb = @(b,x) log(x)/log(b);

Then Y = logb(2,x);

Or, more generally;

Y = logb(b,x);