R help - Jun 2007 - why this doesn't work for qqnorm

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?

thanks a lot.

-jiong
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qqnorm(table[,1])

is what you want, isn't it?

and other forms would include:

par(ask=TRUE)
results = apply(table, 2, qqnorm)
par(ask=FALSE)

b

On Jun 28, 2007, at 9:50 PM, 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?
>
> thanks a lot.
>
> -jiong

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
>  The email message (and any attachments) is for the sole use of the
intended recipient(s) and may contain confidential information.  Any
unauthorized review, use, disclosure or distribution is prohibited.  If you are
not the intended recipient, please contact the sender by reply email and destroy
all copies of the original message (and any attachments).  Thank You.
> 
> 
> 
> 	[[alternative HTML version deleted]]
> 
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