Correction to: Scientific Reports https://doi.org/10.1038/s41598-017-04161-2, published online 21 June 2017

This Article contains an error in Equation 9.

\({\rm{Affinity}}={\parallel {\bf{z}}}_{1}\,-\,{{\bf{z}}}_{2}\parallel \,+\,\sqrt{{\sum }_{i}{({{\rm{z}}}_{1{\rm{i}}}-{{\rm{z}}}_{2{\rm{i}}})}^{2}}\)

should read:

\({\rm{Affinity}}={\parallel {\bf{z}}}_{1}\,-\,{{\bf{z}}}_{2}\parallel \,=\,\sqrt{{\sum }_{i}{({{\rm{z}}}_{{\rm{1i}}}-{{\rm{z}}}_{2{\rm{i}}})}^{2}}\)