I am using the package segmented to fit a simple breakpoint regression to a large number of sets of x,y data. I have used ddply in the package plyr to allow me to run many data sets and gather the results into a data.frame. When I run it I get 3 rows inserted in the output data.frame for each set of data. The middle row contained the correct results (I cross-checked by running a single data set) while all but the degrees of freedom is correct in the other two rows. Help.
Hadley Wickham
2010-May-12 16:43 UTC
[R] Using plyr and segmented together - output problem
Hi Ken, Could you please provide a small reproducible example? There are some hints on how to do so at http://gist.github.com/270442. Hadley On Wed, May 12, 2010 at 11:22 AM, Ken Minns <ken at minns.ca> wrote:> I am using the package segmented to fit a simple breakpoint regression to a > large number of sets of x,y data. I have used ddply in the package plyr to > allow me to run many data sets and gather the results into a data.frame. > When I run it I get 3 rows inserted in the output data.frame for each set of > data. The middle row contained the correct results (I cross-checked by > running a single data set) while all but the degrees of freedom is correct > in the other two rows. Help. > > ______________________________________________ > R-help at 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. >-- Assistant Professor / Dobelman Family Junior Chair Department of Statistics / Rice University http://had.co.nz/