Googling "mixstock CRAN" I found the following:
Package 'mixstock' was removed from the CRAN repository.
Formerly available versions can be obtained from the archive.
Archived on 2014-08-30 as long-term memory-access errors were not corrected.
You might want to contact the maintainer of the package directly with your
Daniel Nordlund, PhD
Research and Data Analysis Division
Services & Enterprise Support Administration
Washington State Department of Social and Health Services
> -----Original Message-----
> From: R-help [mailto:r-help-boun...@r-project.org] On Behalf Of Marc
> Girondot via R-help
> Sent: Wednesday, September 21, 2016 12:18 PM
> To: firstname.lastname@example.org; t.fiorava...@pm.univpm.it
> Subject: Re: [R] Problem Mixstock in R
> Le 19/09/2016 à 10:53, FIORAVANTI TATIANA a écrit :
> > Dear members of the R-project
> > I am doing a mixed stock analysis with the Mixstock Package in R, at
> > the end of the analysis I would summarize all my results (mean,
> > standard deviation, median, percentile, etc...) using the mysum(x,
> > name=NULL) function, but I don't understand which is the correct
> > manner to set up it, what "x" and "name"are? ..Can you help me? Thank
> > you very much,
> > Tatiana
> Dear Tatiana,
> First: I don't find the Mixstock package in CRAN. You should indicate how to
> install it.
> Second: I don't find anywhere a function mysum(). Is it part of the Mixstock
> Third: Send a reproducible exemple to show what you tried to use the
> Finaly you should read the posting guide in this list to have more chance to
> have answers.
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PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
and provide commented, minimal, self-contained, reproducible code.