RE: [R] why won't rq draw lines?
Thanks, this works for me as well, though the lines extend beyond the Y axes
(sometimes). I'm very grateful.
-- Original Message --
From: "Liaw, Andy" <[EMAIL PROTECTED]>
Date: Mon, 19 Jul 2004 10:04:55 -0400
>This works for me:
>
>data(engel)
>plot(engel$x, engel$y, xlab="household income", ylab="food expenditure",
> cex=.5)
>taus <- c(.05,.1,.25,.75,.9,.95)
>lapply(taus, function(tau) abline(coef(rq(y~x, data=engel, tau=tau
>
>HTH,
>Andy
>
>> -Original Message-
>> From: [EMAIL PROTECTED]
>> [mailto:[EMAIL PROTECTED] On Behalf Of
>> [EMAIL PROTECTED]
>> Sent: Monday, July 19, 2004 9:53 AM
>> To: [EMAIL PROTECTED]
>> Subject: [R] why won't rq draw lines?
>>
>>
>> I've been trying to draw quantile linear regression lines
>> across a scatterplot of my data using
>>
>> attach(forrq)
>> plot(PREGNANT,DAY8,xlab="pregnant EPDS",ylab="postnatal
>> EPDS",cex=.5)
>> taus <- c(.05,.1,.25,.75,.9,.95)
>> xx <- seq(min(PREGNANT),max(PREGNANT),100)
>> for(tau in taus){
>> f <- coef(rq(DAY8~PREGNANT,tau=tau))
>> yy <- (f[1]+f[2]*xx)
>> lines(xx,yy)
>> }
>> which is simply the method from the help file with my dataset
>> attached, and the variable names substituted where
>> appropriate. I get the scatterplot, but no lines. Any ideas
>> about what's going on? or wrong?
>>
>>
>> __
>> _
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>>
>
>
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Re: [R] why won't rq draw lines?
The example in help(rq) works for me.
I presume the problem is not due to attach(forrq) as you get the
scatterplot. Why don't you try printing 'xx' and 'yy' inside the loop
and see what you get.
On Mon, 2004-07-19 at 14:53, [EMAIL PROTECTED] wrote:
> I've been trying to draw quantile linear regression lines across a scatterplot of my
> data using
>
> attach(forrq)
> plot(PREGNANT,DAY8,xlab="pregnant EPDS",ylab="postnatal EPDS",cex=.5)
> taus <- c(.05,.1,.25,.75,.9,.95)
> xx <- seq(min(PREGNANT),max(PREGNANT),100)
> for(tau in taus){
> f <- coef(rq(DAY8~PREGNANT,tau=tau))
> yy <- (f[1]+f[2]*xx)
> lines(xx,yy)
> }
> which is simply the method from the help file with my dataset attached, and the
> variable names substituted where appropriate. I get the scatterplot, but no lines.
> Any ideas about what's going on? or wrong?
>
>
> ___
> Most doctors use http://www.Doctors.net.uk e-mail.
> Move to a free professional address with spam and virus protection.
>
> __
> [EMAIL PROTECTED] mailing list
> https://www.stat.math.ethz.ch/mailman/listinfo/r-help
> PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html
>
__
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RE: [R] why won't rq draw lines?
This works for me:
data(engel)
plot(engel$x, engel$y, xlab="household income", ylab="food expenditure",
cex=.5)
taus <- c(.05,.1,.25,.75,.9,.95)
lapply(taus, function(tau) abline(coef(rq(y~x, data=engel, tau=tau
HTH,
Andy
> -Original Message-
> From: [EMAIL PROTECTED]
> [mailto:[EMAIL PROTECTED] On Behalf Of
> [EMAIL PROTECTED]
> Sent: Monday, July 19, 2004 9:53 AM
> To: [EMAIL PROTECTED]
> Subject: [R] why won't rq draw lines?
>
>
> I've been trying to draw quantile linear regression lines
> across a scatterplot of my data using
>
> attach(forrq)
> plot(PREGNANT,DAY8,xlab="pregnant EPDS",ylab="postnatal
> EPDS",cex=.5)
> taus <- c(.05,.1,.25,.75,.9,.95)
> xx <- seq(min(PREGNANT),max(PREGNANT),100)
> for(tau in taus){
> f <- coef(rq(DAY8~PREGNANT,tau=tau))
> yy <- (f[1]+f[2]*xx)
> lines(xx,yy)
> }
> which is simply the method from the help file with my dataset
> attached, and the variable names substituted where
> appropriate. I get the scatterplot, but no lines. Any ideas
> about what's going on? or wrong?
>
>
> __
> _
> Most doctors use http://www.Doctors.net.uk e-mail.
> Move to a free professional address with spam and virus protection.
>
> __
> [EMAIL PROTECTED] mailing list
> https://www.stat.math.ethz.ch/mailman/listinfo/r-help
> PLEASE do read the posting guide!
> http://www.R-project.org/posting-guide.html
>
>
__
[EMAIL PROTECTED] mailing list
https://www.stat.math.ethz.ch/mailman/listinfo/r-help
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