search for: minimisation

OS: Arch Linux (64-bit) (fully updated) GFX Card: Geforce 8800GT (driver version irrelevant - had problem for a year) WM: Openbox Problem: Whenever I minimise WoW, the fps drops to sub-10. I can solve this by minimising and maximising the window again, but if I wait too long after minimising, it doesn't always work. Also, if I minimise it by accident too many times, it also doesn't work.

Hi Apart from nlm() with the stepmax= argument, is there any other >1 dimensional minimisation function where I can limit the step size dynamically. With the NAG routine E04NBF (I think) I used to bound the size of the next step using a*arctan(x/a) tricks where a function was particularly difficult near a boundary and thus 'steer' the result within legal limits. The function I am...

Hi all, Is it possible to programmatically minimise the main window of the windows R gui? I'm designing a small gui with gwidgets & RGtk2 for an non-statistician to use, and it would be nice if I could easily hide all the R stuff that they don't need. Thanks, Hadley -- http://had.co.nz/

Look at it, and you'll see the black outline is missing on the right side of the minimise button. This has been bugging me for a while. I've attached a zoomed in shot, so you can see easily what I mean. It's not a bug in the theme, but in gtk-window-decorator's Metacity theme support, as the border displays perfectly in Metacity. Does it happen with other themes? --------------

I have installed Simple Sudoku (http://www.angusj.com/sudoku/index.php) but I cannot minimise it, nor go to another screen to do something else. If I try, its window gets larger, vertically. I am using wine 20050725 (which is what is packaged for my system at present), on a Debian system running XFree86, with icewm-gnome. Can anyone advise why this program "hogs attention"? -- Phil

I'd like to get disk I/O down to a minimum for my new Centos 5.5 installation. The machine will not be used as a web server anymore, as that's now hosted on a cloud platform. So there are no HTTP requests coming down the line. If I move the SWAP partition and /var/log/ to a small spare drive, and install Centos on the new larger drive, is there anything else that would cause disk

...[,1] [,2] [,3] [,4] [1,] 9.139986 -8.562736e+00 41.648355 -3.801615 [2,] -8.562736 3.351952e+159 -147.279881 -7.083089 [3,] 41.648355 -1.472799e+02 347.493191 -7.509035 [4,] -3.801615 -7.083089e+00 -7.509035 90.681917 Then, I put: solve(A?o2003Selg.lf$info.minimisation.function$hessian) ...and it's shown as following: Error in solve.default(A?o2003Selg.lf$info.minimisation.function$hessian) : sistem is computationally singular: number of reciprocity condition= 1.05091e-159 on account of I work in Spanish, it's shown: Error in solve.default(A?o2003...

Hi Folks, This is not an R question as such, though it may well have an R answer. (And, in any case, this community probably knows more about most things than most others ... indeed, has probably pondered this very question). I: Given a "catalogue" of hundreds of books, where each "entry" has author and title (or equivalent ID), and also Ia) The dimensions (thickness,

Dear All, Thank you for the replies to my first thread here: http://r.789695.n4.nabble.com/global-optimisation-with-inequality-constraints-td3799258.html. So far the best result is achieved via a penalised objective function. This was suggested by someone on this list privately. I am still looking into some of the options mentioned in the original thread, but I have been advised that there may

Dear R users, I am searching for a general minimisaton function like 'ms' in R. Please give me a hint! -- ------------------------------------------------------------ Dipl. Inform. J. Hedderich Institut f?r Medizinische Informatik und Statistik im Klinikum an der CAU Phone : 0431/5973182 Brunswiker Str. 10

Hi, I need to find the minimum value of the parameter, s, such that the function f(s,t) > 0 (where -Inf < t < Inf) I've looked into optim, constrOptim and others but they don't seem to do this. Des anyone have some suggestions? Thanks in advance. [[alternative HTML version deleted]]

Dear all, I want to find the optimal values of a vector, x (with 6 elements) say, satisfying the following conditions: 1. for all x>=0 2. sum(x)=1 3. x[5]<=0.5 and x[6]<=0.5 For the minimisation I'm using nlminb and to satisfy the first 2 conditions the logistic transformation is used with box constraints for condition 3. However, I don't seem to be able to get the values x that i'm expecting from fitting a simpler model. For example, set.seed(0) # creating a correlation matr...

Hi, I try to fit a non linear regression by minimising the sum of the sum of squares. The model is number[2]-(x/number[1])^number[3] Number [2] and number [1] change as the data changes but for all the set of data number[3] must be identical. I have 3 set of data (x1,y1), (x2,y2), (x3,y3). x_a<-c(0,0.5,1,1.5,2,3,4,6) y_a<-c(5.4,5,4.84,4.3,4,2,1.56,1.3)

Dear R users, I am trying to minimise a function using "nlm". I am getting the following error message: "Error: function is too long to keep source" The function is really very long (about 100 A4 pages). Is there anything I could do to solve this problem? At the moment I am using "nlmin" in S-Plus with no problems but I'd prefer to use R. Thank you very

I have a function of several variables which I wish to minimise over four variables, two of the upper bounds for which are defined in terms of other variables in the model over which minimisation will take place. I cannot work out how to code this in such a way as to avoid getting an error message when I run the code. If anyone can provide any assistance I will be most grateful. Best Regards Tom Stone

dear list I am student M.S. statistics in department statistics . I am working in the function "nls" in the [R 2.3.1] with 246 data and want to fit the "exp" model to vectors( v and u ) but I have a problem to use it u 5.000000e-13 2.179057e+03 6.537171e+03 1.089529e+04 1.525340e+04 1.961151e+04 2.396963e+04 2.832774e+04 3.268586e+04 3.704397e+04 4.140209e+04

...i')+10*Sum(XiMi)/Mavg) Subject to: 0 <= Xi <= 0.05 ABS(Sum(Xi)) = 0.2 where Mi - Market Cap of Stock i Xi - Initial weight of Stock i Xi' - New weight of Stock i Mavg = Average weighted market cap of portfolio. My portfolio has a long as well as a short side, therefore the ABS. The minimisation function is basically a penalty on the change from initial weight and the distance from the Average market cap. My problem is that I need to optimise a vector X with the weights instead of one weight at a time... i.e. I need to be able to change all the stocks in the portfolio simultaneously. I a...

...e links he gives points out. In some tests, I've also noted that some of the algorithms are less than stellar e.g, convergence tests in one or two optimization routines. Should we have a wiki item to help people find material? My own "Compact Numerical Methods: linear algebra and function minimisation" codes were first published 30 years ago this month. They are the Pascal library on Netlib. I have some Fortran codes I could post, and BASIC versions too. In fact, the function minimisation codes that are actually more advanced than the routines Brian Ripley used in optim() have already been...

Hi All, I would like to know, is there a *ballpark* figure for how many parameters the minimisation routines can cope with? I'm asking because I was asked if I knew. Cheers, Federico -- Federico C. F. Calboli Department of Epidemiology and Public Health Imperial College, St. Mary's Campus Norfolk Place, London W2 1PG Tel +44 (0)20 75941602 Fax +44 (0)20 75943193 f.calboli [.a.t] i...

Hi, I'm a bit confused about how Asterisk decides in which order of preference it should list the different codecs in its SDP message during SIP call setup. In my sip.conf [general] section I've got disallow=all allow=gsm allow=ulaw allow=alaw But when Asterisk bridges a call from an E1 to VoIP it sends out an INVITE with the codecs listed in the following order of preference