search for: mogunus

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2010 Aug 05
4
Reducing a list of functions by composition fails
Hi All, I'd like to be able to specify the ordered composition of several functions. So I defined compose: compose <- function(f,g){ function(x){f(g(x))} } and some simple test functions: plus2 <- function(x){x+2} plus3 <- function(x){x+3} plus4 <- function(x){x+4} > (compose(plus2,compose(plus3,plus4)))(3) [1] 12 Works fine. But trying to reduce a list of functions by
2010 Aug 06
3
Partial Function Application
Hi. I would like to partially apply a function to a list of arguments, and I don't know how to do this in R, without perhaps writing default values to the formals() of my function, or writing to the environment object of a function. For context, my definition of partially apply is: "fix some of the arguments, leaving the others as variables, return a new function that takes the un-fixed