Hi, Using goCluster, i obtain a resulting plot. And with clusterVisualHclust visualization method, gocluster highlights different regions but some annotation terms (GO ids) are indicated several times. Why is it not concatenated into one region instead of several contigous regions with the same id? Any help ? Thanks, TM -- MOUROT Tabar? Stagiaire Master Pro BioInfo Plateforme transcriptome Institut de G?nomique Fonctionnelle 141, rue de la Cardonille 34094 Montpellier Cedex 5 Tel : +33 (0)4 67 14 29 64 E-mail : tabare.mourot at igf.cnrs.fr -- Passerelle antivirus IGF --