Group, I'm currently trying to find out how the function correlog in the ncf package may be useful to me for calculating cross-correlograms. The function's output includes P-values for all distance classes, but it seems that only positive values can become significant. Is this true and correct? If so, why? Thanks in advance. Ren? Eschen. _______________________________________ Ren? Eschen CABI Bioscience Switzerland Centre 1 Rue des Grillons CH-2800 Del?mont Switzerland +41 32 421 48 87 (Direct) +41 32 421 48 70 (Secretary) +41 32 421 48 71 (Fax)