I am doing now a regression analysis for my data by using General Additive Model ; However, the half of my data is zero.
Therefore, I was wondering if it is right to conduct my analysis by only using GAM .
Can you tell us about the variable of interest? I would wonder if it is a count variable given the number of zeros, but without more information we are at a loss. Can you plot the variable as well for us, so we can understand what you are working with.