Question

% MATLAB contains functions to calculate the natural logarithm (log), the
% logarithm to the base 10 (log10), and the logarithm to the base 2
% (log2). However, if you want to find a logarithm to another base - for
% example, base b - you'll have to do the math yourself with the formula

logb(x) = loge(x)/loge(b)

Answer 1

@phi

Answer 2

what is the question?

Answer 3

how do i find another logarithm to another base using the formula above?

Answer 4

if you want to find a logarithm to another base - for
% example, base b - you'll have to do the math yourself with the formula

Answer 5

in Matlab, log(x) means ln(x)
if you want base 2 (for example) you would do
log(x)/log(2)

we know (I hope) \(\log_2(4) = 2\)
on the other hand log(4)/log(2) = 1.38629436111989/0.693147180559945= 2

Answer 6

i am a little confused. If I want base 2 I need to do log(x)/log(2) ?

Answer 7

yes

Answer 8

you can test it on your calculator or in matlab

Answer 9

Here is a function that does what you want
% y = logb(x,b)
% returns log_base_b(x)
function y= logb(x,b)
y= log(x)./log(b);

Answer 10

Let me play around with this a bit in matlab. The comment before the last comment I see where you are going.