search for: npv

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...

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 checks in Excel.

Hi, I have two sets of sensitivity, specificity, positive predictive value, and negative predictive value, and accuracy from two tests on the same subjects. Is there an R package that does such paired comparisons? Thanks, Gang Chen

...-31 4.15 -0.02 352 Wartsila Oyj 1996-07-31 7.73 0.09 353 GEA Group AG 1996-07-31 10.12 0.04 354 LEGRAND ORD 1996-07-31 -7.46 -0.20 355 Mayr-Melnhof Karton AG 1996-07-31 4.71 -0.05 356 GEVAERT NPV 1996-08-30 NA NA 357 NOKIA K FMA2.50 1996-08-30 7.65 0.03 358 Altadis S.A. 1996-08-30 7.65 0.55 359 Metrovacesa S.A. 1996-08-30 4.55 -0.17 360 Oce N.V. 1996-08-30 9.43 0.23 The v...

...ialup. The problem occurs on both lines for incoming calls and it just happened again today on an outgoing call after 15 minutes of talk. I have tried busydetect=no and yes and neither one make a difference. suggestions? /etc/asterisk/zapata.conf busydetect=yes busycount=10 -- Ruben Fagundo NPV Corporation Tel: 617-848-0890 x100 Fax: 617-249-1994

Dear Mr Peter Dalgaard and Mr Dieter Menne, I sincerely thank you for helping me out with my problem. The thing is taht I already have calculated SENS = Gg / (Gg + Bg) = 89.97% and SPEC = Bb / (Bb + Gb) = 74.38%. Now I have values of SENS and SPEC, which are absolute in nature. My question was how do I interpret these absolue values. How does these values help me to find out wheher my model is

Dear all Seems that puzzles always come in packs. I was asked to help with some statistics in blood analysis. (You can not refuse your wife's asks :-). She has contingency table for values IgVH mutation and ZAP expression. I can do chi-square test (in R) and get a results, and with some literature I can try explain them. However she found an article in which they use SPSS and use

...ives (say 30% of entire sample). In stage 2 we conducted in-depth interviews with the 30% of likely positives plus another 20% of the negatives as controls. We simply did not have resources to interview all negatives. A reviewer pointed out that measures such as sensitivity, specificity, PPV, NPV, AUC, etc. are potentially biased because they are based on a sample that is over-weighted by positives. That is, we let 50% of our original sample (many negatives) "get away". The editor suggested "weighting" to provide unbiased estimates. Perhaps we are not looking in the r...

.../www.s-anand.net/Calculating_IRR_manually.html #~ #~ Step 1: enter zeroes (0) against dates that do not have any cash outflow or inflows. #~ Step 1bis: calculate IRR for these cash flow values using normal IRR function. #~ Step 1tris: or using an iteractive approach as bisection method to find the NPV zeroes. #~ Step 2: multiply this value of IRR by 365 to get annual IRR (since, these are daily cash flows). #~ Step 3: refine using the formula =( 1+ R / 365) ^ 365 - 1), where R is the the value obtained in Step2. #~ Regards, Alberto Santini -- View this message in context: http://www.nabble.com...

...esponsible for working with project manager(s) to ensure the integrity and completeness of the solution delivery process. Partners with Project Manager on timeline, issues and risk mitigation strategies. Provides input to Total Cost of Ownership (TCO), Return On Investment (ROI), Net Present Value (NPV) and other relevant financial analysis. Creates documentation to ensure business readiness for all projects. *·** *Accepts ownership of tasks and sub-projects and works under limited direction. Provides input to training documentation on systems. Provides on-going system support. *·** *Works pr...

...@@ -2656,9 +2916,11 @@ * in the case of running down an entire address space. */ void -pmap_remove_pages(pmap_t pmap, vm_offset_t sva, vm_offset_t eva) +pmap_remove_pages(pmap, sva, eva) + pmap_t pmap; + vm_offset_t sva, eva; { - pt_entry_t *pte, tpte; + unsigned *pte, tpte; pv_entry_t pv, npv; int s; vm_page_t m; @@ -2671,7 +2933,9 @@ #endif s = splvm(); - for(pv = TAILQ_FIRST(&pmap->pm_pvlist); pv; pv = npv) { + for(pv = TAILQ_FIRST(&pmap->pm_pvlist); + pv; + pv = npv) { if (pv->pv_va >= eva || pv->pv_va < sva) { npv = TAILQ_NEXT(pv, pv_pli...

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Hello list. I'm trying to rebuild the 2.6.9.67.0.20.EL kernel, but it fails even without modifications. How did I try it? Created a (non-root) build environment (not a mock ) Installed the kernel.scr.rpm and did a rpmbuild -ba --target=`uname -m` kernel-2.6.spec 2> prep-err.log | tee prep-out.log The build failed at the end: Processing files: kernel-xenU-devel-2.6.9-67.0.20.EL Checking

I have an easy question. I setup Asterisk with a TDM400 w/ 4FXO ports and I have the following problem. A call comes in correctly. The callers dials extension 100 (grandstream SIP phone). The caller then hangup, before the call goes to voice mail, however, the phone continues to ring, then goes to voicemail, and leaves an empty vmail message, long after the caller has hung up. Is there a way

I would like to pose the following problem to this mailing list to see if any of you have any suggestions you may offer. I am running samba on a RedHat 7.2 Athalon box with software RAID 0 dual IDE disks on an ext3 filesystem. I have several users in a large community of users that are always hitting the samba server. The machine has been consistently reliable with one exception. There is