similar to: Simple Problem: Plotting mathematical functions

I've got a list of 5 matrices that are each 5 x 6. I'd like to end up with a 5 x 6 matrix that contains the mean value of the 5 original matrices. I can do this by brute force, but there must be a better way than making each matrix into a vector and then remaking a matrix thanks very much for any help david freedman ll=list(structure(c(9.7, 17.6, 20.8, 24.1, 33.8, 14.5, 25.7, 29.8,

My college professor has created a Math program for astronomy. I don't know what programming language it was built in but Wine will not run it. I want to ask him for the source code because I assume it was C so I might be able to make it so it runs on Linux. Until then do any of you know how this program will run? It does not have a virus, trust me, this is strictly professional.

Dear list, making mathematical expressions in plots is not difficult: expression(phi[1]) for example. At this moment I am stuck in creating a vector of expressions: pos <- 1:10 lab <- letters[pos] Now, I would like to create a vector of expressions which I could use for labeling the x-axis of a lattice plot. ll <- as.expression(paste(pos," phi[",lab,"]",sep =

We are finding more and more clinical researchers interested in learning R and are starting to teach R to clinicians. We have put some teaching material on our site: http://biostat.mc.vanderbilt.edu -- Frank E Harrell Jr Professor and Chair School of Medicine Department of Biostatistics Vanderbilt University

Hi, I tried to use naivebayes in package 'e1071'. when I use following parameter, only one predictor, there is an error. > m <- naiveBayes(iris[,1], iris[,5]) > table(predict(m, iris[,1]), iris[,5]) Error in log(sapply(attribs, function(v) { : Non-numeric argument to mathematical function However, when I use two predictors, there is not error any more. > m <-

Hello! I need a function to compute the erosion of a binary image by a structuring element. I need the structuring element to be a ball of a given radius. As far as I know the libraries adehabitat and spatstat include functions of mathematical morphology but I couldn't find a function which computes the erosion by a ball. Any idea? Thanks!

I have tried without success to find a way including the square root symbol in lattice strips as part of my conditioning labels. I have tried supplementing by creating a list of vectors using the var.name function coupled with the expression function used in xlab/ylab. xyplot(adjusted_Rand_index~cluster|distance_measure, main="Level of agreement between partitions: Wards Method",

I am trying to get superscripts on the y-axis. I keeping getting syntax error: This works as advertised: > plot(c(1:10), ylab= expression(paste(x^ theta))) This does not: >plot(c(1:10), ylab= expression(paste(x^ {++}))) Note that I am trying to get ++ as superscript. Any suggestions? Thanks. -.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.- r-help mailing

How does one produce subscripts in axis labels? -------------------------------------------------------------------- Kurt Lohman, Biostatistician Department of Public Health Sciences tel: (336) 716-7167 Wake Forest University School of Medicine fax: (336) 716-6427 Winston-Salem, NC 27157 klohman at rc.phs.wfubmc.edu

I'd like to make axis titles, chart titles, legends and the like mathematically nice (e.g., have proper superscripts and subscripts, variables in italics, and so on). Ideally, one could go into ``math mode" a la LaTeX, and write something like plot(blah, xlab="Methane in $\mbox{cm}^3$ / g", blah). This is just an ideal, but it would be nice. Is some approximation of this

I am unable to find the mathematical details of the codec , please guide. Thanks in advance. -- Manu Ghulyani B.E.(Hons.) Electronics & Instrumentation. B.I.T.S. Pilani. -------------- next part -------------- An HTML attachment was scrubbed... URL: http://lists.xiph.org/pipermail/flac-dev/attachments/20120207/0caaeac0/attachment.htm

On 7 February 2012 06:24, Manu Ghulyani <manughulyani at gmail.com> wrote: > I am unable to find the mathematical details of the codec , please guide. Unfortunately I'm not aware of a clear write-up of how the FLAC format works in detail. One must muddle through between http://flac.sourceforge.net/format.html and the source code. Basically the audio is chopped into a blocks and

On 7 February 2012 21:59, Martijn van Beurden <mvanb1 at gmail.com> wrote: > AFAIK, FLAC uses a fixed block length so block boundaries are just put > somewhere a block ends. Flake, another FLAC-encoders can use variable > block length and has a algorithm to decide the length, but this is > outside of the -0 to -8 presets, as these are all fixed block length. Aha. Thanks for

On 02/08/2012 11:49 AM, Ralph Giles wrote: > On 7 February 2012 21:59, Martijn van Beurden <mvanb1 at gmail.com> wrote: > >> AFAIK, FLAC uses a fixed block length so block boundaries are just put >> somewhere a block ends. Flake, another FLAC-encoders can use variable >> block length and has a algorithm to decide the length, but this is >> outside of the -0 to

On 8 February 2012 10:00, Justin Ruggles <justin.ruggles at gmx.com> wrote: > 0.5% to 1.0% on average. That's with a fairly simple algorithm. Not very worthwhile. I imagine it's possible to do quite a bit more on some files, but it would be pretty expensive to find the boundaries... -r

On 02/08/2012 01:06 PM, Ralph Giles wrote: > On 8 February 2012 10:00, Justin Ruggles <justin.ruggles at gmx.com> wrote: > >> 0.5% to 1.0% on average. That's with a fairly simple algorithm. > > Not very worthwhile. I imagine it's possible to do quite a bit more on > some files, but it would be pretty expensive to find the boundaries... Yes, it likely can do

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I forgot to mention that version 0.50 will do "greek" and "accents" in plot labels. The basic idea is that you should be able to replace any character vector by an expression vector when doing plot annotation. E.g. plot(rnorm(10),main=expression(hat(Theta))) This produces a plot with a main title consisting of a capital Theta with a "hat" on it. The idea is to

Hello, I'm trying to put a mathematical expression into a legend, but R complains about a syntax error. Basically i'd like to do this: legend.text = c(expression(x < 10), expression(x >= 10)) The manual says that one can only pass mathematical expressions to axis, text etc. but not to the legend command? Is there a workaround for this? thanks a lot for help, Arne -- Arne

Hi all, Could anyone help answer the following questions, please? (I'm using R-1.8.1-4 on Fedora Core 1 and very new to R) (i) Is it possible to specify a font family (e.g. courier or helvetica) when graphing? (ii) How can I make ticks point inwards on all four sides of a plot? Is it possible to have minor and major ticks? (iii) How would I specify a symbol "\sim" (i.e.