Do you have zero or negative x values?

mpd4 wrote:
I have 22 plots that are all a similar, logarithmic shape, yet only three of
them give me the option to add a logarightmic trendline.

The plots where the logarithmic trendline does work are perhaps closer to a
true logarithmic shape than those where it does not work, but not by much.

Does the logarithmic trendline only work when the shape is very close?

--

Andy Pope, Microsoft MVP - Excel
http://www.andypope.info