Erratum for IEEE Transactions Article

This page provides an erratum for the article

     The Growing Hierarchical Self-Organizing Map: 
     Exploratory Analysis of High-Dimensional Data

     by Andreas Rauber, Dieter Merkl, and Michael Dittenbach

     In: IEEE Transactions on Neural Networks, Vol. 13, No. 6, pp. 1331-1341, 
         November 2002, IEEE.

Inadvertently, two corrections were not included in the final release, resulting in an erroneous version of our article being published in the IEEE Transactions on Neural Networks. Since both the print as well as the on-line version currently contain these errors, we herewith provide the correct version of the article, together with pointers to the two errors found in the article, which are:

Section IV-B, page 1334, column 2, sentence immediately preceeding expression 9: The erroneous version reads: "Then, the error unit e is determined as the unit with the mqe as follows:" It should rather read: "Then, the error unit e is determined as the unit with the maximum qe as follows:" Comment: "mqe" stands for the "mean quantization error" or "mean qe" in short. However, the error unit is the one exhibiting the "maximum" quantization error, rather than the mean. Obviously, in an eager quest to use the shorter abbreviations rather than outspelled longer versions, it was decided to use the abbreviation defined for the mean qe.

Section IV-B, page 1335, column 2, reference to Figure 3: Only half of Figure 3 was printed in the page proofs. Rather than correcting, Figure 3 was omitted in the final version, resulting in Figure 2 on page 1335 being followed by Figure 4 on page 1337. The missing Figure 3 looks as follows:

Figure 3: Initialization of Units:The corner units of newly created maps are initialized to preserve the orientation of their parents' map.
(For a larger view, click here.)

A correct version of the article is available on-line as:
PDF and gnu-zipped postscript.