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How to make a function within a function?
My goal is to insert the function inside the function.
Here is an example of function inside a function
f <- function(n) {
g <- function(x) {
x**n
}
}
such that
> f(3)(4)
[1] 64
But I have no idea what you are exactly after...
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I am using the lp() function, but would like to use the optimal parameter as an input for following functions. Is there a way to get them?
You could also use missing() to test whether or not the argument b was supplied:
myFunc <- function(a,b){
if(missing(b)) {
a
} else {
a + b
}
}
myFunc(3,1.5)
# [1] 4.5
myFunc(3)
# [1] 3
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I'm learning R right now but I can't find a solution for my problem. I'd like to create 100 files with a text line inside, let's say "Hello world!". Does anyone know how to do it?
Use a for loop and write_lines for example:
for(i in 1:100) {
write_lines("Hello World", path = sprintf("file%s.txt", i))#
}
or use mapply
mapply(write_lines, path = sprintf("file%s.txt", 1:100), x = "Hello World")
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I have a vector c("A","B","C",......) and a list list(c("A"),c("B","C"))
I want to get a vector c(1,2,2....)
Is there any function in some basic packages?
we can use merge
merge(stack(setNames(lst, seq_along(lst))), data.frame(values=v1))$ind
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I would like to get this loop to work. I am trying to save different dataframes with different names at once. I don't know how to get the path part of the code to vary with i:
for (i in specific) {
write.dta(get(paste0("degreeS", i)), "D:/Educacion/PeerEffects/",paste0( "degreeS", i,".dta"))
}
I needed to use the command file.path(). This solved the problem
for (i in specific) {
write.dta(get(paste0("degreeS", i)), file.path("D://Educacion//PeerEffects//", paste0("degreeS", i,".dta")))
}
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How can I achieve somethign like this in R:
like this?
vec <- runif(5)
plot(0,0,type="n",xlim=c(0,1.5),ylim=c(0,7),bty="n",axes="off")
at<-barplot(vec,horiz=TRUE,add=TRUE)
text(vec,at,signif(vec,1),pos=4)
text(rep(1,5),at,c("mn","lu","co","-","my"))