The waveform analysis uses the following files: wavestore.mat -- a structure with 179 amplitude normalized V4 waveforms waveanalysis.m -- the main matlab routine to make a histogram and do stats HartigansDipSignifTest.m -- routine to do Hartigan's signif test HartigansDipTest.m -- routine for Hartigan's signif test The Hartigan's code is form Melcher & Ringach (2002): 30. Hartigan and Hartigan PM (1985). The dip test of unimodality. Annals of Statistics. 13:70-84. 31. Mechler F and Ringach DL (2002). On the classification of simple and complex cells. Vision Res. 42: 1017-33. To use the code in the waveform analysis: In matlab: > load wavestore; > wave_analysis(wavestore); This should produce plots and give results. Press return after it prints each result of the Hartigan's test (which takes a while to run because it uses a bootstrap method to estimate significance). Email Jude at jude@salk.edu if you have trouble using code, and be sure to have informative e-mail title since I delete tons of spam each day. Jude