Hi Consider the following variable:
--8<---------------cut here---------------start------------->8--- x1 <- list( A = 11, B = 21, C = 31 ) x2 <- list( A = 12, B = 22, C = 32 ) x3 <- list( A = 13, B = 23, C = 33 ) x4 <- list( A = 14, B = 24, C = 34 ) y1 <- list( x1 = x1, x2 = x2 ) y2 <- list( x3 = x3, x4 = x4 ) x <- list( f1 = y1, f2 = y2 ) --8<---------------cut here---------------end--------------->8--- To extract all fields named "A" from y1, I can do ,---- | > sapply(y1, "[[", "A") | x1 x2 | 11 12 `---- But how can I do the same for x? I could put an sapply into an sapply, but this would be less then elegant. Is there an easier way of doing this? Thanks, Rainer -- Rainer M. Krug email: Rainer<at>krugs<dot>de PGP: 0x0F52F982
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