Dear SPMers, I have the last (hopefully) up to date release of spm_graph.m for SPM99 (% @(#)spm_graph.m 2.29 Karl Friston 00/09/14) With this version, when I plot 'Event/epoch-related responses' with 'average over sessions?' -> No, I cannot plot several sessions on the same graph (as it was apparently the case before : first session in red, second session in blue etc.) The question str = sprintf('which session (1 to %d)',ss); ss = spm_input(str,'+1','n','1',1,ss); accepts only a scalar, i.e. one session at a time. Why ?? Were the previous plots incorrect ? How can I obtain the epoch/event-related plot for for more than one session ? Any help would be much appreciated, Melanie -- Mélanie PELEGRINI-ISSAC tel : (33 0)1 53 82 84 20 U678 Inserm/UPMC fax : (33 0)1 53 82 84 48 CHU Pitié-Salpêtrière email :[log in to unmask] 91 bd de l'Hôpital 75634 PARIS Cedex 13