Computes IRR (Internal Rate of Return) for cash flows with different cash flow and compounding conventions. Cash flows need not be evenly spaced.
1 2 3 4 5 6 7 8 9 10 11 12 
cf 
Vector of cash flows 
interval 
the interval c(lower, upper) within which to search for the IRR 
cf.freq 
Frequency of annuity payments: 1 for annual, 2 for semiannual, 12 for monthly. 
comp.freq 
Frequency of compounding of interest rates: 1 for annual, 2 for semiannual, 12 for monthly, Inf for continuous compounding. 
cf.t 
Optional vector of timing (in years) of cash flows. If omitted regular sequence of years is assumed. 
r.guess 
the starting value (guess) from which the solver starts searching for the IRR 
toler 
the argument 
convergence 
the argument 
max.iter 
the argument 
method 
The root finding method to be used. The

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