Duplicated curly bracket in R

Question

I wrote a function in R using the code below: when I run it, an error message occurs: How does this happen?

columnmeans <- funtion(y) {
    nc <- ncol[y]
    means <- numeric(nc)
    for (i in 1:nc) {
        mean[i] <- mean(y[,i])
    }
    mean
}

I expect the function to work, but instead I received:

Error: unexpected '}' in "}"

typo in `funtion`? should be `function`? and it should be `ncol(y)` and `means[i]` not `mean[i]` and return `means` — chinsoon12, Jul 04 '19 at 09:48
In addition, there is a function in the `base` package called `colMeans` — markus, Jul 04 '19 at 09:50
Related post: [here](https://stackoverflow.com/q/25889234/680068) and [here](https://stackoverflow.com/q/23273022/680068) — zx8754, Jul 04 '19 at 10:00

score 1 · Accepted Answer · answered Jul 04 '19 at 09:51

1

You have a few errors in the code above. Here's a working version:

columnmeans <- function(y) {
    nc <- ncol(y)
    means <- numeric(nc)
    for (i in 1:nc) {
        means[i] <- mean(y[,i])
    }
    means
}

v <- data.frame(a=1:10, b=10:1)
columnmeans(v)
[1] 5.5 5.5

Your main issues are:

funtion should be function
ncol[y] should be ncol(y)
mean[i] should be means[i]
mean should be means

answered Jul 04 '19 at 09:51

Stewart Macdonald

2,062
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1

Helped you out with an upvote @StewartMacdonald ;-) – doctorG Jul 04 '19 at 10:00
6

It is not about "want to see the world burn", but site rules, if it is typo, then it should be closed as such. Plus it is a duplicate, see my comment with links. – zx8754 Jul 04 '19 at 10:08

Duplicated curly bracket in R

1 Answers1