"Mark D. Williams" wrote: > FWIW, if you want to save time and memory, a faster way to do the above > is as follows: > > WAVE> temp = BYTARR(1000,1000,25, /NoZero) + 10B I get the fastest response (in IDL) with temp = replicate(10B, 1000, 1000, 25) Cheers, Liam. -- Liam E. Gumley Space Science and Engineering Center, UW-Madison http://cimss.ssec.wisc.edu/~gumley