Partial Derivatives in R

Have you considered genD{numDeriv}? 

      If this does not answer your question, I suggest you try the 
"RSiteSearch" package.  The following will open a list of options in a 
web browser, sorted by package most often found with your search term: 


library(RSiteSearch)
pd <- RSiteSearch.function('partial derivative')
pds <- RSiteSearch.function('partial derivatives')
attr(pd, 'hits') # 58
attr(pds, 'hits')# 52
summary(pd)
HTML(pd)
HTML(pds)

   
      The development version available via 
'install.packages("RSiteSearch", repos="http://R-Forge.R-project.org")' 
also supports the following: 
     

pd. <- unionRSiteSearch(pd, pds)
attr(pd., 'hits')# 94
HTML(pd.)


      Hope this helps. 
      Spencer Graves

Quick question:

Which function do you use to calculate partial derivatives from a model
equation?

I've looked at deriv(), but think it gives derivatives, not partial
derivatives.  Of course my equation isn't this simple, but as an example,
I'm looking for something that let's you control whether it's a partial or
not, such as:

somefunction(y~a+bx, with respect to x, partial=TRUE)

Is there anything like this in R?