DPlot

I was inclined to think that it was a noise issue, and I think you've confirmed my thoughts. I appreciate your help on this matter. Thank you very much.

Thanks so much for your help. Is there any way you could help me understand how D-Plot calculates the four parameters. I still don't understand that as much as I would like.

I am having trouble understanding how D-Plot calculates it's variables for the Friedlander's eqn. When I use my own experimental peak pressure and time of arrival (not the ones automatically generated, defaults), my curve is vastly different than the one D-Plot generates. Any help on what's going on ...