Hi, This array is of type "list" but print() reports otherwise: a1 <- array(list(1), 2:0) typeof(a1) # [1] "list" a1 # <2 x 1 x 0 array of character> # [,1] # [1,] # [2,] No such problem with an array of type "logical": a2 <- array(NA, 2:0) typeof(a2) # [1] "logical" a2 # <2 x 1 x 0 array of logical> # [,1] # [1,] # [2,] Thanks, H. -- Herv? Pag?s Program in Computational Biology Division of Public Health Sciences Fred Hutchinson Cancer Research Center 1100 Fairview Ave. N, M1-B514 P.O. Box 19024 Seattle, WA 98109-1024 E-mail: hpages at fredhutch.org Phone: (206) 667-5791 Fax: (206) 667-1319