Finding out which functions are called within a given function [duplicate]

try this example: library(codetools) ff <- function(f) { leaf <- function (e, w) { r <- try(eval(e), silent = TRUE) if(!is.null(r) && is.function(r)) ret <<- c(ret, as.character(e)) } call <- function (e, w) { walkCode(e[[1]], w) for (a in as.list(e[-1])) if (!missing(a)) walkCode(a, w) } ret <- c() walkCode(body(f), makeCodeWalker(call = call, leaf = leaf, … Read more

Why can’t I define a function inside another function?

It is not obvious why one is not allowed; nested functions were proposed a long time ago in N0295 which says: We discuss the introduction of nested functions into C++. Nested functions are well understood and their introduction requires little effort from either compiler vendors, programmers, or the committee. Nested functions offer significant advantages, […] … Read more

Is it possible to define more than one function per file in MATLAB, and access them from outside that file?

The first function in an m-file (i.e. the main function), is invoked when that m-file is called. It is not required that the main function have the same name as the m-file, but for clarity it should. When the function and file name differ, the file name must be used to call the main function. … Read more