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calculating IRR (accounting) in R

2 messages · paul sorenson

paul sorenson
# 
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.

cheers
paul sorenson
#
paul sorenson wrote:
Thanks for the answers people.  Comparing the answers with what Excel 
pops out shows just how assumptions can vary.  In particular whether the 
first payment is at T0 or T1.

cheers

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