Log Fit gives error -20036

[jcoloccia]

When I try to do a Logarithmic Fit on my data, I get error -20036.  The error indicates that some either I have 0 valued y values or a mix of positive and negative Y values.  I'm %150 certain that this is definately not the case.

What else could be causing this problem?

Thanks,
John

[altenbach]

Please attach some sample data or an example VI containing e.g. sample data as a diagram constant.

[jcoloccia]

Actually I figured it out.  It turns out that it's not sufficient to have non-zero Y values for the Log fit.  You must have non-zero X values as well.  I started at x=0.  Offsetting slightly fixed it all up.

Thanks

John Coloccia