And in that vein, the recently released MethComp package by Bendix
Carstensen may be of service.

HTH,
Dennis

On Fri, Feb 25, 2011 at 5:39 AM, Marc Schwartz <marc_schwartz@me.com> wrote:

> On Feb 24, 2011, at 4:50 PM, Denis Kazakiewicz wrote:
>
> > Dear R people
> > Could you please help with following
> >
> > Trying to compare accuracy of tumor size evaluation by different
> > methods. So data looks like
> >
> > id true metod1 method2 ...
> > 1  2  2       2.5
> > 2  1.5        2       2
> > 3  2  2       2
> >
> > etc.
> >
> > Could you please give a hint how to deal with that.
> > Seems like {merror} does not suite to me because I am trying to compare
> > accuracy of measurements with their true known values not just overall
> > agreement of methods.
> > Moreover sample size is ridiculously small (33 patients) so ANOVA is not
> > much of help (or is it?)
> > Any suggestions, hints and even guesses are highly appreciated. I am
> > stuck a bit.
>
>
> Denis,
>
> I would suggest that you start here:
>
>  http://www-users.york.ac.uk/~mb55/meas/meas.htm
>
> This covers various resources pertaining to the design and analysis of
> measurement studies, primarily based upon methods by Bland and Altman.
>
> HTH,
>
> Marc Schwartz
>
> ______________________________________________
> R-help@r-project.org mailing list
> https://stat.ethz.ch/mailman/listinfo/r-help
> PLEASE do read the posting guide
> http://www.R-project.org/posting-guide.html
> and provide commented, minimal, self-contained, reproducible code.
>

	[[alternative HTML version deleted]]

