Figure 6.

The optimal parameter search for exponential type of probability density estimators in Eq. 2. A set of 60 proteins is used and their correlation coefficients are averaged over the set. The averaged correlation coefficients are plotted with respect to the change of parameter ${\sigma }_{\mathit{i}\mathit{j}}$ and k. It is seen that except for k = 0.5, all other kernels achieve their maximal correlation coefficient in the range ${\sigma }_{\mathit{i}\mathit{j}}\in [4,10]$.