[R] What am I doing wrong with this loop ?

[Bill.Venables at csiro.au]

Here is a start

> x <- as.data.frame(runif(2000, 12, 38))
> length(x)
[1] 1
> names(x)
[1] "runif(2000, 12, 38)"
> 

Why are you turning x and y into data frames?

It also looks as if you should be using if(...) ... else ... rather than ifelse(.,.,), too.

You need to sort out a few issues, it seems. 

-----Original Message-----
From: r-help-bounces at r-project.org [mailto:r-help-bounces at r-project.org] On Behalf Of eric
Sent: Thursday, 3 March 2011 1:19 PM
To: r-help at r-project.org
Subject: [R] What am I doing wrong with this loop ?

What is wrong with this loop ?  I am getting an error saying incorrect number
of dimensions y[i,2]

x <- as.data.frame(runif(2000, 12, 38))
z <-numeric(length(x))
y <- as.data.frame(z)
for(i in 1:length(x)) {
  y <- ifelse(i < 500, as.data.frame(lowess(x[1:i,1], f=1/9)) ,
as.data.frame(lowess(x[(i-499):i,1], f=1/9)))  
  z[i] <-y[i,2]
}

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