Dear all I would like to run in R an uncertainty/sensitivity analysis. I know that these two are performed together. I have a geochemical model where I have the inputs, the water variables (e.g. pH, temperature, oxygen ect) and as well an output of different variables. What I would like to do is to estimate the uncertainty that the output variables have considering the uncertainty of the input variables as well how the variations of my inputs contribute most to the variations of my output (probably though the sensitivity analysis). I was thinking perhaps with Monte Carlo analysis. Is there a way to do that? Thanks a lot. Maria [[alternative HTML version deleted]]