- Bert
Bert Gunter
Genentech Nonclinical Biostatistics
-Original Message-
From: r-help-boun...@r-project.org [mailto:r-help-boun...@r-project.org] On
Behalf Of Joris Meys
Sent: Friday, June 25, 2010 2:15 AM
To: Ralf B
Cc: R mailing list
Subject: Re: [R] Simple qqplot question
Sorry, mis
Sorry, missed the two variable thing. Go with the lm solution then,
and you can tweak the plot yourself (the confidence intervals are
easily obtained via predict(lm.object, interval="prediction") ). The
function qq.plot uses robust regression, but in your case normal
regression will do.
Regarding
Short rep: I have two distributions, data and data2; each build from
about 3 million data points; they appear similar when looking at
densities and histograms. I plotted qqplots for further eye-balling:
qqplot(data, data2, xlab = "1", ylab = "2")
and get an almost perfect diagonal line which mean
Unfortunately not. I want a qqplot from two variables.
Ralf
On Thu, Jun 24, 2010 at 7:23 PM, Joris Meys wrote:
> Also take a look at qq.plot in the package "car". Gives you exactly
> what you want.
> Cheers
> Joris
>
> On Fri, Jun 25, 2010 at 12:55 AM, Ralf B wrote:
>> More details...
>>
>> I
Also take a look at qq.plot in the package "car". Gives you exactly
what you want.
Cheers
Joris
On Fri, Jun 25, 2010 at 12:55 AM, Ralf B wrote:
> More details...
>
> I have two distributions which are very similar. I have plotted
> density plots already from the two distributions. In addition,
>
24, 2010 2:45 PM
To: r-help@r-project.org
Subject: [R] Simple qqplot question
I am a beginner in R, so please don't step on me if this is too
simple. I have two data sets datax and datay for which I created a
qqplot
qqplot(datax,datay)
but now I want a line that indicates the perfect match so
More details...
I have two distributions which are very similar. I have plotted
density plots already from the two distributions. In addition,
I created a qqplot that show an almost straight line. What I want is a
line that represents the ideal case in which the two
distributions match perfectly.
n...@r-project.org [mailto:r-help-boun...@r-
> project.org] On Behalf Of Ralf B
> Sent: Thursday, June 24, 2010 3:45 PM
> To: r-help@r-project.org
> Subject: [R] Simple qqplot question
>
> I am a beginner in R, so please don't step on me if this is too
> simple. I have t
You are going to have to define the question a little better. Also,
please provide a reproducible example.
On Thu, Jun 24, 2010 at 4:44 PM, Ralf B wrote:
> I am a beginner in R, so please don't step on me if this is too
> simple. I have two data sets datax and datay for which I created a
> qqplo
I am a beginner in R, so please don't step on me if this is too
simple. I have two data sets datax and datay for which I created a
qqplot
qqplot(datax,datay)
but now I want a line that indicates the perfect match so that I can
see how much the plot diverts from the ideal. This ideal however is
no
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