I am trying to use the for loop variables for an assingment in R. Let's say I have a list of 3 strings:
fruits = list('apple', 'pear', 'grape')
I wish to use these names to assign in a for loop e.g.
values = list()
for (name in fruits){
values <- c(values, name = 5)
}
I would want a new list that looks like this:
values
apple = 5
pear = 5
grape = 5
However what I receieve is this:
values
name = 5
name = 5
name = 5
Is this possible in R or can this not be done?
Thanks
You can assign it with [[]]:
fruits = list("apple"," pear", "grape")
#I wish to use these names to assign in a for loop e.g.
values = list()
for (name in fruits){
values[[name]] <- c(5)
}
Also some times its easier not to set the names during a loop, but to set the names afterward. So if you have you list already
values <- list(5, 5, 5)
# or values <- as.list(rep(5,3))
you could do
values <- setNames(values, fruits)
Or if you are using Map() to get a value for each of these inputs, the result will be named for you assuming you pass in a character vector rather than a list. (And if you are just storing names, then a vector is probably better for most things)
Map(function(...) 5, as.character(fruits))
# $apple
# [1] 5
# $pear
# [1] 5
# $grape
# [1] 5
