CODEWITHSUNDEEP
rrandom-forest
Jessie
Jessie

Reputation: 21

how to recognize numbers in a name of redomforest fomula?

I have several RandomForest formulas named forest.1, forest.2, forest.3, etc. Would like to read them one by one using "for" iterations, for example:

for(i in 1:20){
   model = forest.i
   predict.y = predict(model, test.x)
}

Of course, forest.i (i from 1 to 20) cannot be recognized as 20 fomulas. What can I do to make it work? Thanks!

Upvotes: 2

Views: 54

Answers (2)

krlmlr
krlmlr

Reputation: 25444

Try putting them into a list first:

forests <- list(
  forest.1,
  forest.2,
  forest.3,
  ...,
  forest.20
)

(Fill in the dots.) Then, you can simply do

for (model in forests) {
  ... # your code
}

If you don't want to type the 20 list entries, create a character vector with the values "forest.1" till "forest.20" and use mget.

Upvotes: 0

Roman Luštrik
Roman Luštrik

Reputation: 70623

You can use function get, e.g. model <- get(sprintf("forest.%i", i)). This will create a string, e.g forest.1 and try to fetch an object with this name.

Upvotes: 2

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