Question

How can I convert this apply function in R studio

apply(trees, 1, function(x) tree_s3(x[1],x[2],x[3]))

into a for loop?

Answer 1

You can use for loop by iterating from 1 to the number of rows. Then access each row using the index as shown below.

We are iterating using rows because the margin argument is 1 in this apply statement.

Although I don't have the definition of what tree_s3( ) is doing so I cannot show you the exact output for this function. You can share the full code in the comments if you want me to show the exact conversion.

for i in 1:nrow(trees){

x <- trees[ i,  ]

#Your function here using x as the argument

}

(*Note: Please up-vote. If any doubt, please let me know in the comments)