search for: patrn

...tation and listserv archives on this topic -- but as yet have not found a solution. I'm sure this is pretty simple with R, but I cannot work out how without resorting to ugly nested loops. As far as I can tell, grep, match, and %in% are not the correct tools. Question: given these vectors -- patrn <- c(1,2,3,4) exmpl <- c(3,3,4,2,3,1,2,3,4,8,8,23,1,2,3,4,4,34,4,3,2,1,1,2,3,4) how do I get the desired answer by finding the occurence of the pattern and returning the starting indices: 6, 13, 23 Suggestions very much appreciated! Kind regards, Matt Redding, Ph.D. Principal Scientist...

Is there a function to efficiently search for a subsequence within a vector? For example, with x <- 1:100 I'd like to search for the sequence c(49,50,51), and be told that it occurs exactly once, starting at location 49. (The items in the vectors might be numeric or character, and there might be repetitions within the search pattern or within the vector I'm searching.) Duncan

Hola todos. Tengo un data. frame al que le quiero cambiar el nombra a alguna de sus columnas. Por ejemplo: >seba <- data.frame("constante"=1,"numeros"=1:10, "letras"=LETTERS[A:Z]) Listo sus nombres: >names(seba) [1] "constante" "numeros" "letras" Quiero que la columna que tiene el nombre "constante" pase a