Resolution:
## Figure 1.
Visualization of the RR-BLUP estimator () and the LASSO estimator () as solutions to a least-squares problem with different penalization [[38],[39]]. We illustrate a two-dimensional case. The blue ellipses show the contours of the
RSS function around the ordinary least-square solution (). The ridge estimator is the point at which the innermost elliptical contour touches
the circular ridge penalty . The LASSO estimator is the point at which the innermost elliptical contour touches
the diamond shaped LASSO penalty |u_{1}| + |u_{2}|<c_{L}. Contrary to the ridge penalty, the LASSO penalty allows estimations to be exactly
zero.
Riedelsheimer |