Cumulative WEibull equation is;
y= e(-(x/a)^b)
please can I be advised on the first derivative
i.e. dy/dx =
BRILLIANT! THIS AGREES WITH WHAT I have seen published, but I COULD NOT RATIONALIZE IT. I HAVE FORGOTTON MY CALCULUS. My plan is to enter the Weibull equation (in the differenial form) into a program that has a diffeerential equation solver. I have data and I want the porgram to solve by best fitting the data.
I may have to enter the WEibill as 2 diff. equations.