How to view R source code [duplicate]

Question

I'm trying to view a source code. For example for cook.distance(). This is what I have tried

cooks.distance
function (model, ...) 
UseMethod("cooks.distance")
<bytecode: 0x3f25b5c>
<environment: namespace:stats>

then i tried:

 debug(cooks.distance)

and got nothing. Then I tried:

 methods(cooks.distance)
 [1] cooks.distance.glm* cooks.distance.lm* 

 Non-visible functions are asterisked

then I tried:

 lm:::cooks.distance.default
 Error in loadNamespace(name) : there is no package called ‘lm’

someone told me lm was in the MASS package so I tried the following:

 MASS:::cooks.distance.default
 Error in get(name, envir = asNamespace(pkg), inherits = FALSE) : 
 object 'cooks.distance.default' not found

how can I view the source code? I tried to look in the source code but could not locate the function?

Looks like it's in the stats package, not MASS. Try stats:::cooks.distance.lm. — joran
– joran, Commented Mar 22, 2013 at 20:14
This is a very similar question stackoverflow.com/questions/11173683/… and is part of the r-faq tag — Dason
– Dason, Commented Mar 22, 2013 at 22:01
Linked to wrong canonical question; should be How can I view the source code for a function? — smci
– smci, Commented Feb 1, 2017 at 3:25

harkmug · Accepted Answer · 2013-03-22 20:25:21Z

3

Try this:

getAnywhere(cooks.distance.glm)

answered Mar 22, 2013 at 20:25

harkmug

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