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From: Floris Zoutman on 14 Apr 2010 09:53
I am trying to use the symbolic toolbox but there seems to be an extremely stupid bug in my version of matlab. I have tried the following line of code:
x=sym('x')
y=log(x)
output: y=ln(x)
f=matlabFunction(y)
output f=@(x)ln(x)
f(3)
output: Error unknown function ln.

For some reason matlab's symbolic toolbox seems to replace the function log, which is a built-in function to calculate the natural logarithm of a number, with the function ln, a function that does not exist. Can anybody tell me why this happens and how to fix it? I am using Matlab R2009A 32-bit on Windows XP. Many thanks for your help!

With kind regards,

Floris
From: almog shalom on 25 Apr 2010 09:17
Your bug is very strange, indeed.
I use R2009a on Linux (Suse) with x86_64 architecture and don't have this bug.
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