Image matrix of discriminative weight functions. The image was derived from the trained classifiers based on the trimer, tetramer, pentamer or hexamer kernel. Each of the lines shows the values of one specific weight function obtained from an average over 50 runs. Each of the 200 columns corresponds to a certain sequence position. By construction, the exonic splicing enhancer motif starts at position 100. For noise reduction all matrix elements below 0.25 have been zeroed.