Re: log to arbitrary base

[Doug Stewart]

On Mon, Aug 17, 2015 at 8:44 PM, Doug Stewart <address@hidden> wrote:

On Mon, Aug 17, 2015 at 6:23 PM, Eric Smith <address@hidden> wrote:

Hi

Both qalc (1) and Matlab have a log function like;
  log(125, 5) = 3

How do I find the log to base n with Octave?

Eric

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I think you are looking for

y= log(x)/log(n)

is that what you want?

here is a fun way to do it:

Create  a function called logxn

logxn=@(x,n) log(x)/log(n)

logxn =

@(x, n) log (x) / log (n)

now use it

>> logxn(125,5)

ans =  3.0000 

--

DAS

--

DAS