search for: visser

...0,0,0,1,0,0,0,0,0,0,1,0,0,0,0,0,0,1,0,0,0,0,0,0,1,0) mat=matrix(a, ncol=6,byrow=T) eigen(mat) The matrix is a population matrix for a plant pathogen (Powell et al 2005). Basically I would really like to know why this happens so I will know if it can occur again. Thanks for any comments, Marco Visser Comment: In Matlab the the dominant eigenvetor and eigenvalue of the described matrix are given as the sixth. Again no idea why. reference J. A. Powell, I. Slapnicar and W. van der Werf. Epidemic spread of a lesion-forming plant pathogen - analysis of a mechanistic model with infinite age str...

...[,1] [,2] [1,] 2 2 [2,] 3 2 Meaning that there are two transitions from 1 to 1, two from 1 to 2, three from 2 to 1 and two from 2 to 2. Using for loops etc this is of course no problem, but I am curious whether there is a smarter solution. Any hints appreciated, Ingmar -- Ingmar Visser Department of Psychology, University of Amsterdam Roetersstraat 15, room 1009 1018 WB Amsterdam The Netherlands http://users.fmg.uva.nl/ivisser/ tel: +31-20-5256735

Dear useRs, I'm trying to create a barplot like so: x=matrix(1:10,2,5) barplot(x,leg=c("left","right"),besid=T) The legend is placed in default position topright, however the data are plotted there too. I tried controlling the legend position by adding x="topleft" but this results in an error that x matches multiple formal arguments. Leaving out the legend

...I do get occasional bus errors around the time of exiting one of the C functions. Where do I need to be looking to solve this problem? Do bus errors stem from unmapped memory exceptions? How can I find out if that is what is happening while running R? Any hints greatly appreciated. Best, ingmar visser

...bject or body 'help' to icecast-request at xiph.org You can reach the person managing the list at icecast-owner at xiph.org When replying, please edit your Subject line so it is more specific than "Re: Contents of Icecast digest..." Today's Topics: 1. Crash!!! (Sytze Visser) 2. Re: Crash!!! (Thomas B. Rücker) 3. Re: Crash!!! (Sytze Visser) ---------------------------------------------------------------------- Message: 1 Date: Thu, 30 Aug 2018 22:27:14 +0200 From: Sytze Visser <sytze.visser at gmail.com> To: Icecast streaming server user discussions <...

...my question; is there any function that is able to "count" how often a point falls into a grid based on the x and y location? So I need to discretize the spatial locations to a regular grid and then counting how often a point occurs. Many thanks for your thoughts on this problem. Marco Visser __________________________________________________ [[alternative HTML version deleted]]

Hello, I tried to fit a poisson distribution but looking at the function fitdistr() it does not optimize lambda but simply estimates the mean of the data and returns it as lambda. I'm a bit confused because I was expecting an optimization of this parameter to gain a good fit... If I would use mle() of stats4 package or mle2() of bbmle package, I would have to write the function by myself

...powerpc-apple-darwin8.10.1 locale: en_GB.UTF-8/en_GB.UTF-8/en_GB.UTF-8/C/en_GB.UTF-8/en_GB.UTF-8 attached base packages: [1] stats graphics grDevices utils datasets methods base other attached packages: [1] spatial_7.2-40 RUnit_0.4.17 MASS_7.2-40 robustbase_0.2-8 Ingmar Visser Department of Psychology, University of Amsterdam Roetersstraat 15 1018 WB Amsterdam The Netherlands t: +31-20-5256723 [[alternative HTML version deleted]]

Hello All, Does anyone know of a package that performs constraint-based clusters? Ideally the package could perform "Time-Ordered Clustering", a technique applied in a recent journal article by Runger, Nelson, Harnish (using MS Excel). Quote, "in our specific implementation of constrained clustering, the clustering algorithm remains agglomerative and hierarchical, but observations

On Tue, 30 May 2023 17:43:31 +0000 Heather Lucas <hlucas2 at lsu.edu> wrote: > Hello, > > I've been enjoying using the "Mixture and Hidden Markov Models in R" > by Visser & Speekenbrink to learn how to apply these analyses to my > own data using depmixS4. > > I currently have a fitted 4-state mixture model with three emissions > variables and one binomial covariate (HS). I am trying to compute > confidence intervals using the following code, wher...

...ucture is easy. My question remains If webm/ogv is supported but mp4 not, what are the technical differences in how icecast handles the one and not the other? What does icecast manage/do for supported formats as opposed to unsupported ones? Kind regards On Wed, 2019-05-01 at 19:56 +0200, Sytze Visser wrote: > I read somewhere that MP4 is not supported on icecast, which is a > pity. I have invested a lot in an icecast based audio solution and > want expand it with video. It all depends on what one means by 'MP4' (which is more a marketing term than a technical one). AAC+ (aka...

...h html5 video: https://rigor.com/blog/optimizing-mp4-video-for-fast-streaming. Progressive downloading, seeking and video time all works 100% on a 195MB file. Regards On Wed, May 1, 2019 at 10:19 PM Marvin Scholz <epirat07 at gmail.com> wrote: > > > On 1 May 2019, at 22:06, Sytze Visser wrote: > > > Hi Fred. > > > > Appreciate your response. > > > > Maybe in my explanation I have some red and green apples, but I can > > agree that my understanding is as you explained it. 😊 > > > > The point is that if I can successfully stream mp4...

Is there a package in R that handles general linear (in-)equality + box constrained optimization? If it is not there, could anyone advise me which way to go? And/or point me to packages that solve these problems partially? best, ingmar -- Ingmar Visser Department of Psychology, University of Amsterdam Roetersstraat 15, 1018 WB Amsterdam The Netherlands http://users.fmg.uva.nl/ivisser/ tel: +31-20-5256735

Hello, I've been enjoying using the "Mixture and Hidden Markov Models in R" by Visser & Speekenbrink to learn how to apply these analyses to my own data using depmixS4. I currently have a fitted 4-state mixture model with three emissions variables and one binomial covariate (HS). I am trying to compute confidence intervals using the following code, where fmms4s is the model: f...

...Using this very config file and only changing the port number yields a valid page. Using port 80 screws up the MIME type. Any hints would be very much appreciated. FYI. Server = Debian Sarge Ruby = 1.8.4 Rails = 1.0.0 Lighttpd = 1.4.8 Postgres = 8.1.2 This box runs no other stuff. -- Dick Visser TERENA IT-support officer / webmaster Singel 468D, 1017 AW, Amsterdam, The Netherlands Phone: +31 20 5304488 Fax: +31 20 5304499 Email: dick@terena.nl http://www.terena.nl Live IPv4/6 webcam: http://www.terena.nl/~dick PGP-key: http://www.terena.nl/~dick/pgp.key.asc

Hello list, I am dealing with a noisy function (gradient,hessian not available) with simple boundary constraints (x_i>0). I've tried constrOptim() using nelder mead to minimize it but it is way too slow and the returned results are not satisfying. simulated annealing is so hard to tune and it always crashes R program in my case. I wonder if there are any packages or functions can do

...sidual standard error: 0.5399828 Estimated effects are balanced Stratum 3: Within Error in print.aov(xi, ...) : dims [product 60] do not match the length of object [100] In addition: Warning message: In resid * wt^0.5 : longer object length is not a multiple of shorter object length Ingmar Visser Department of Psychology, University of Amsterdam Roetersstraat 15 1018 WB Amsterdam The Netherlands t: +31-20-5256723 [[alternative HTML version deleted]]

...o 4.15.0-1022-azure #22~16.04.1-Ubuntu SMP Thu Aug 16 10:31:05 UTC 2018 x86_64 x86_64 x86_64 GNU/Linux *sytze at KerkRadio:~$ cat /etc/icecast2/icecast.xml* <icecast> <hostname>kerkradio.co.za</hostname> <location>South Africa</location> <admin>sytze.visser at gmail.com</admin> <limits> <clients>100</clients> <sources>2</sources> <queue-size>524288</queue-size> <client-timeout>30</client-timeout> <header-timeout>15</header-timeout>...

...technical differences in how icecast handles the one and not the other? What does icecast manage/do for supported formats as opposed to unsupported ones? Best regards On Wed, May 1, 2019 at 4:39 PM Thomas B. Rücker <thomas at ruecker.fi> wrote: > Hi, > > On 5/1/19 9:58 AM, Sytze Visser wrote: > > I am streaming live with webm with ffmpeg to icecast 2.4.2. After the > > stream ends, I am unable to determine the duration of the file using > > ffprobe or mediainfo. Not sure but it seems that this has to do with > > headers? > > > It's a fundament...

...nder keywords `pager', `more' or `less' in the documentation. Developers, thanks for all the work. -- David A. van Leeuwen < @ElseWare.nl> Echt stijlvol sterven doe je / bij een ander op de mat Op de dag dat je bezorgd wordt / door het NRC Handelsblad ---Joop Visser