[FieldTrip] how to generate a cross correlogram using two m clust .t files

[youngk11]

Hi, all

I am trying to make a cross correlogram using two of m clust .t files 
acquired from 16 hours of cortical recording and spike sorting process 
using tetrodes. The problem is the initialization of cfg is not clear to 
me for example, cfg.spikechannel or  cfg.trialfun.

I cannot run ft_definetrial(cfg) as well as 
ft_spike_maketrials(cfg,spike) which seems to be necessary to run the 
ft_spike_xcorr.

Have anybody tried this before?

Thanks a lot for your help in advance.

Young