[R] calculating IRR (accounting) in R

paul sorenson sourceforge at metrak.com
Wed Nov 30 21:50:23 CET 2005

I am trying to replace a spreadsheet model of a project justification 
with an R script.

I can't seem to track down R functions to calculate Internal Rate of 
Return and NPV?  Am I missing something?  NPV doesn't seem so difficult 
to calculate (at least for a regular series) but I am struggling to 
identify how to solve for IRR in R.

It would be sufficient if it worked for a regular series but really 
useful if there was something that worked with irregular time series.


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