Hello there, I'm an R novice and am trying to figure out how to create an external for loop. My current loop iterates 15 times and stores the resulting values in 3 separate vectors. What I need is to create an outside loop that will run internal loop 4 times, sum the resulting vectors for each, and then store the sum of each in a vector of length 4 for each investment.
Right now, the target vector has the same value in each position, which is what I'm trying to fix. Here's what I have at this point: Inv1Returns <- c(0, 1000, -500, 500) Inv2Returns <- c(0, -9000, 30000, 10000) Inv3Returns <- c(0, 4000, -1000, -2000) random = runif(15, 0, 1) Inv1Outcome = NULL Inv2Outcome = NULL Inv3Outcome = NULL Inv1Total = NULL Inv2Total = NULL Inv3Total = NULL for (j in 1:4) { for (i in 1:15 ) { Inv1Outcome[i] = if (random[i] <= .25){Inv1Returns[1]} else if (random[i] > .25 & random[i] <= .50){Inv1Returns[2]} else if (random[i] > .50 & random[i] <= .75){Inv1Returns[3]} else {Inv1Returns[4]} Inv2Outcome[i] = if (random[i] <= .20){Inv2Returns[1]} else if (random[i] > .20 & random[i] <= .30){Inv2Returns[2]} else if (random[i] > .30 & random[i] <= .70){Inv2Returns[3]} else {Inv2Returns[4]} Inv3Outcome[i] = if (random[i] <= .50){Inv3Returns[1]} else if (random[i] > .50 & random[i] <= .70){Inv3Returns[2]} else if (random[i] > .70 & random[i] <= .90){Inv3Returns[3]} else {Inv3Returns[4]} } Inv1Total = append(Inv1Total, sum(Inv1Outcome)) Inv2Total = append(Inv2Total, sum(Inv2Outcome)) Inv3Total = append(Inv3Total, sum(Inv3Outcome)) } Inv1Total Inv2Total Inv3Total Sincerely, Ryan [[alternative HTML version deleted]] ______________________________________________ R-help@r-project.org mailing list -- To UNSUBSCRIBE and more, see https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.