Comparing the shapes of regression functions
回归函数形状的比较
Does a regression function follow a specified shape? Do two regression functions have the same shape? How can regression functions be grouped, based on shape? These questions can occur when investigating monotonicity, when counting local maxima or when studying variation in families of curves. One can address these questions by considering the rank correlation coefficient between two functions. This correlation is a generalisation of the rank correlation between two finite…