fzero tolerance issue ... and a related bug

[Joza]

Hi guys.

So I would like to use fzero to solve for the root of a function. The
tolerance test I would like to use however is a bit tricky:

I would like to refer to the value of each iteration of the fzero function,
and stop when the difference between two values from two consecutive
iterations is less that a particular value. But how do I refer to the output
from each iteration of fzero? And baring in mind, I have a starting interval
[x1, x2] for the function also. My test refers to machine_epsilon times the
absolute value from that iteration.

As an aside, when I run the function with default tolerance, I get a message
that a valid initial bracket cannot be constructed ... but I am SUPPLYING
the initial bracket!!!? Any ideas?



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