[R] bootstrapping data.frame and matrix

[chiara peroni]

Hi,

I use an old version of R (5.02). The reason I do not use the package
boot on the last version of R, is the clash of the package itself with
expressions contained in other packages, i.e. the"sm " library. I don't
know if you have the same problem.

Thank you!

Chiara

"Roger D. Peng" wrote:
> 
> The help page for `bootstrap' says that to bootstrap more complex
> statistics (it gives an example for the correlation), you need to
> bootstrap the (row) indices of the data frame and not the data frame
> itself.  By the way, you appear to have the order of the arguments to
> bootstrap() incorrect but I guess this is a typo?
> 
> In general, I would suggest using the `boot' package from CRAN (along
> with the Davison & Hinckley book) instead of the `bootstrap' package.
> `boot' can work neatly on more general data structures and also uses the
> trick of bootstrapping the indices of the data rather than the data
> themselves.
> 
> Also, it appears you are using an old version of R because the the "_"
> operator is deprecated in the current version (1.7.0).
> 
> -roger
> 
> cp133 wrote:
> > Dear All,
> >
> > When bootstrapping a statistics based on more than one vector, from a
> > data.frame or a matrix object, it looks like I am not able to pass the
> > data to R. What am I doing wrong?
> > I use the library "bootstrap".
> > Here is an example with a data.frame called "data"
> >
> >
> >  "boot2_bootstrap(data, theta, nboot)
> >
> > I get the following error message:
> >
> > Error in inherits(x, "data.frame") : Argument "xdata" is missing, with
> > no default"
> >
> >
> > Please note that the same is happening when I create a matrix from the
> > data.frame with the function cbind
> > (i.e.
> > names(data)
> > [1] "shortrate" "y1"        "y5"        "y10"       "y15"
> > "y20"
> > [7] "y25"
> > xdata_cbind(data$y10,data$shortrate)
> > is.matrix(x.data)
> > TRUE)
> >
> > Thanks in advance,
> >
> > Chiara
> >
> > ______________________________________________
> > R-help at stat.math.ethz.ch mailing list
> > https://www.stat.math.ethz.ch/mailman/listinfo/r-help
> >
> >