[R] why this doesn't work for qqnorm

[Simon Blomberg]

You need to specify a whole column. try qqnorm(table[,1])

On Thu, 2007-06-28 at 18:50 -0700, Jiong Zhang, PhD wrote:
> I want to qqnorm every column in a table.  When I try the first column
> using
> 
> qqnorm(table$column1), it worked.
> 
> But when I use
> 
> qqnorm(table[1]), it tells me "Error in stripchart(x1, ...) : invalid
> plotting method".
> 
> What happen?  How can I make a function that qqnorms every column?

Try this:

dat <- data.frame(x=rnorm(20), y= rnorm(20), z =rnorm(20))
par(mfrow=c(3,1))
sapply(dat, function (x) {qqnorm (x) ; qqline (x) } )

Cheers,

Simon
> 
> thanks a lot.
> 
> -jiong
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-- 
Simon Blomberg, BSc (Hons), PhD, MAppStat. 
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