search for: irr

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...

The irr package seems to install correctly: > install.packages("irr") trying URL 'http://cran.us.r-project.org/src/contrib/irr_0.61.tar.gz' Content type 'application/x-tar' length 13848 bytes opened URL ================================================== downloaded 13Kb * Inst...

Dear Profs. Ripley & Gamer, Thanks a lot for your prompt answer and your advice. Indeed, I managed to track the bug by launching R from the c-shell instead of the Mac GUI. In that case, after typing > library(irr) I obtained the following error message: > Erreur dans parse(file, n, text, prompt) : syntax error at > 653: irr.name =3D "R > Erreur : unable to load R code in package 'irr' Because Mac, PC and Unix encode end-of-lines differently, this actually corresponds to line # 1304 in...

...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

...k in all circumstances: > selectMethod(print, "its") Method Definition: function (x, ...) { print(x@.Data <mailto:x@.Data> , ...) } <environment: namespace:its> Signatures: x target "its" defined "its" > fundPME.lst[[1]]$irr An object of class "its" IRR HSBC MEEM 2005-10-31 0.1926175 0.07802736 Slot "dates": [1] "2005-10-31 Westeuropäische Normalzeit" > fundPME.lst[[1]]$irr@.Data IRR HSBC MEEM 2005-10-31 0.1926175 0.07802736 > print(fundPME...

...ktop.org Reporter: yugiohjcj at 1s.fr QA Contact: nouveau at lists.freedesktop.org Hello, I remark that Minetest 0.4.13 is crashing often (about 1 time by hour) when I am using the "nouveau" driver. I have already reported this bug to Minetest [1]. As Minetest is using Irrlicht as its engine, I suspect Irrlicht to be a possible cause of my problem. For this reason, I have also reported this bug to Irrlicht [2]. But regarding the log, I also see that Mesa itself could be suspected as it is present at the top of the backtrace. Here is the crash log: $ gdb minetest GN...

The formatting of the IO-APIC debug key info has niggled me for a while, and with the latest interrupt bug I am chasing, has finally motivated me to fix it. The attached patch causes all columns to line up, and removes the comma which served no purpose in combination with the spaces already present. -- Andrew Cooper - Dom0 Kernel Engineer, Citrix XenServer T: +44 (0)1223 225 900,

hi: could someone please point me to a function that allows me to solve general non-linear functions? > irr.in <- function(r, c1, c2, c3 ) { return(c1+c2/(1+r) + c3/(1+r)^2); } > solve.nonlinear( irr.in, -100, 60, 70 ); 0.189 If someone has written an irr function, this would be helpful, too---though not difficult to write, either. thanks for any pointers. Regards, /iaw --- ivo welch

...g R for about 1 week and recently learned about the Aggregate function, and from reading online it seems like it is comparable to a SQL group by to perform summary functions. I am looking to do a summary function, such as SUM/MIN, but instead of these basic functions, I would like to calculate the IRR. Assuming I have a data set DS01: FirstName LastName NCF Date A B -100 1/1/2001 A B 50 2/1/2002 A B 200...

Following on my posting of this morning, concerning a problem that I am having constructing a self-starting function for use with nls (and eventually with nlsList and nlme), the following is the self-starting function called NRhyperbola: > NRhyperbola function (Irr,theta,Am,alpha,Rd) { # Am is the maximum gross photosynthetic rate # Rd is the dark resiration rate (positive value) # theta is the shape parameter # alpha is the initial quantum yeild # (1/(2*theta))* (alpha*Irr + Am - sqrt((alpha*Irr + Am)^2 -4*alpha*theta*Am*Irr))- Rd } attr(,"in...

Recently our automated testing system has caught a curious assertion while testing Xen 4.1.5 on a HaswellDT system. (XEN) Assertion ''(sp == 0) || (peoi[sp-1].vector < vector)'' failed at irq.c:1030 (XEN) ----[ Xen-4.1.5 x86_64 debug=n Not tainted ]---- (XEN) CPU: 0 (XEN) RIP: e008:[<ffff82c48016b2b4>] do_IRQ+0x514/0x750 (XEN) RFLAGS: 0000000000010093 CONTEXT:

Hi, all There are 62 samples in my data and I tested 3 times for each one, then I want to use ICC(intraclass correlation) from irr package to test the consistency among the tests. *combatexpdata_p[1:62] is the first text results and combatexpdata_p[63:124] * is the second one and *combatexpdata_p[125:186]* is the third. Here is the result: result<-icc(cbind(combatexpdata_p[1:62],combatexpdata_p[63:124],combatexpdata_p[125...

...ons should still work, I think. Maybe this helps; regards Heinrich. > -----Urspr?ngliche Nachricht----- > Von: cristian at biometria.univr.it [mailto:cristian at biometria.univr.it] > Gesendet: Montag, 27. Oktober 2003 14:02 > An: r-help at stat.math.ethz.ch > Betreff: [R] Query: IRR Confidence Intervals > > > > Does anybody know a R routine to calculate exact Confidence > Intervals for > Incidence Rate Ratio? > > Thanks > Cristian > > > ------------------------------------------------- > Biometria - biometria.univr.it > > __...

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://albertosantin...

...ave mastered the lme function but the nlme function has me stumped. I am attempting to fit a nonlinear mixed model with 4 levels of nesting. I am getting a cryptic error message and do not know what is wrong with the syntax of the call. This is the call: > nlme(Photosynthese~NRhyperbola(Irr,theta,Am,alpha,Rd), + fixed=theta+Am+alpha+Rd~1, + random=theta~1|Reference/Espece/Plante/Groupe, + data=lit.data) NRhyperbola is a self-starting function with one variable (Irr) and four parameters (theta,Am,alpha,Rd). The data set (lit.data) contains Photosynthese (dependent variable) and...

...lem setting up a self-starting function for use in nonlinear regression (and eventually in the mixed model version). The function is a non-rectangular hyperbola - called "NRhyperbola" - which is used for fitting leaf photosynthetic rate to light intensity. It has one independent variable (Irr) and four parameters (theta, Am, alpha and Rd). I have created this to act as a self-starting function. The self-starting function seems to work (i.e. when I call "getInitial" it provides the initial values), but I can't get it to work when used within "nls". Here is an ex...

Hi, I''ve still have problems with ACPI(?) on Xen. After some system startup or resume CPU temperature goes high although all domUs (and dom0) are idle. On "good" system startup it is about 50-55C, on "bad" - above 67C (most time above 70C). I''ve noticed difference in C-states repored by Xen (attached files). On "bad" startups in addition suspend

The report on R_help about problems loading package irr (in a UTF-8 locale, it seemed) prompted me to look a little deeper. There are quite a few packages with Latin-1 chars in their .R files, and a couple in UTF-8. Apart from non-ASCII chars in comments, this is a problem as the code concerned cannot be represented in some locales R runs in (for...

Hi All, I am using fleiss kappa for inter rater agreement. Are there any know issues with Fleiss kappa calculation in R? Even when I supply mock data with total agreement among the raters I do not get a kappa value of 1. instead I am getting negative values. I am using the irr package version 0.70 Any help is much appreciated. Thanks and Regards M [[alternative HTML version deleted]]

...y stupidity to solve a probably quite simple problem of generating artificial data with defined features. I am conducting a study of inter-observer-agreement in child-bronchoscopy. One of the most important measures is Kappa according to Fleiss, which is very comfortable available in R through the irr-package. Unfortunately medical doctors like me don't really understand much of statistics. Therefore I'd like to give the reader an easy understandable example of Fleiss-Kappa in the Methods part. To achieve this, I obtained a table with the results of the German election from 2005: party...