CODEWITHSUNDEEP
rloopsfor-loopreturn
onhalu
onhalu

Reputation: 745

Return from loop

for (j in 1:2){ #first iteration
  for (i in 1:2){ #second iteration
    lst1 <- replicate(i,  data.frame( 
      matrix(c(letters[1:2], 
               sample(c(rep(1,100),0), size = 1),
               sample(c(rep(0,100),1), size = 1)),  ncol = 2) ), simplify = FALSE)
  }      
  return(lst1)
}

I would expect that lst1 would return from second loop (i) to go to next iteration of the first loop (j).

I know I would do something like this replicate(i*j,....) to get all iterations but this solution doesn't meet my expectations.

output is list of 2

a, b 
0, 1
a, b
0, 1

but I would expect list of 4 (two iterations with two steps)

Upvotes: 0

Views: 421

Answers (1)

jpiversen
jpiversen

Reputation: 3212

return() is only meant to be used inside a function, not in a loop. Are you looking for the control flows break or next?

From the documentation in R:

break breaks out of a for, while or repeat loop; control is transferred to the first statement outside the inner-most loop. next halts the processing of the current iteration and advances the looping index. Both break and next apply only to the innermost of nested loops.

Upvotes: 1

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