sie.auto.plot() visualizes the estimation of coefficient, gives the elbow plot and represents the cross validation result.
sie.auto.plot(res.auto.fit, type, title = "")A list which contains 3 plot related to the estimation of coefficient, Elbow point and cross validation in order
the output from sie.auto.fit() function
type indicates which type of basis is used (There are 31 types in this package)
give the title for the auto estimate plot