[R] creating a list of lists

From: Paul Boutros <paul.boutros_at_utoronto.ca>
Date: Sun 07 Jan 2007 - 04:22:15 GMT


I'm trying to create a series of randomForest objects, basically in a loop like this:

forests <- list();

for (level in 1:10) {

          # do some other things here

	# create a random forest
	forest <- randomForest(
		x = x.level,
		y = z.level,
		ntree = trees

	forests <- c(forests, forest);


But instead of creating a list of 10 forests, this creates a list of 180 elements, 18 for each forest. Is there a way to create a list of randomForest objects for use later on in code like:

for (forest in forests) {

         values <- predict(forest, data);
         # do things with these predicted values


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