search for: xirr

Hello. A few weeks ago, I need to calculate the Internal Rate of Return for irregular intervals. There is the package 'financial', with the function 'cashflow', calculating irr for regular intervals. So I developed xirr, managing irregular intervals, that's accepting a vector of dates as xirr Excel function. You can find the code at http://albertosantini.blogspot.com/2008/01/xirr.html #~ Title: XIRR Excel function simulation #~ #~ Reference 1: How to manage irregular intervals - http://www.geocities.com/a...

Hi, I am new to R, and as a first exercise, I decided to try to implement an XIRR function using the secant method. I did a quick search and saw another posting that used the Bisection method but wanted to see if it was possible using the secant method. I would input a Cash Flow and Date vector as well as an initial guess. I hardcoded today's initial date so I could do ch...