结合R中使用不同训练集构建的随机森林

I am new to R (day 2) and have been tasked with building a forest of random forests. Each individual random forest will be built using a different training set and we will combine all the forests at the end to make predictions. I am implementing this in R and am having some difficulty combining two forests not built using the same set. My attempt is as follows: I am new to R (day 2) and have been tasked with