similar to: plotting an expression

Hi, I make a graphic using xyplot, it is very good. xyplot((ocorrencia/isca)~frag|especie) But I need to plot a curve for each especie's plot. I try to use panel.abline and others panel., but I dont succeed. I need to plot the function exp(a+b*x+c*x^2)/1+exp(a+b*x+c*x^2), a b and c are different for each especie. Normally I use the curve function to add a curve in a points

Hi R collective, I quite like the "curve" function because you can chuck a R function into it, and see the graph in one line of R. I had a google and found some threads for filling under the line; http://tolstoy.newcastle.edu.au/R/e2/help/07/09/25457.html However they seem to miss the point of the simplicity of going, "I wonder what that looks like, and can I have some colour

Hola! It is somewhat inconvenient to use plot.function, when add=TRUE. The following (miniscule) change makes it behave better: plot.function <- function (fn, from , to, xlim = NULL, ...) { if (!is.null(xlim)) { if (missing(from)) from <- xlim[1] if (missing(to)) to <- xlim[2] } curve(fn, from, to, xlim = xlim, ...) } The only

+ Hello, The parametric equations of an ellipsoid can be written in terms of spherical coordinates. The three spherical coordinates are converted to Cartesian coordinates by X=a cos (α) sin(θ) Y=b sin(α) sin(θ) Z=c cos(θ) for α and θ The parameter α varies from 0 to 2 π and θ varies from 0 to π . Here ( X o , Y o ,Z o ) is the center of the ellipsoid, and θ is the angle

I am having following problem: I?m constructing model for calculation of area of triangle. I know sides a, b, and gamma angle. I wish to calculate the area using heron?s formula: S <- sqrt(s*(s-a)*(s-b)*(s-c)) where s <- (a+b+c)/2 and c is calculated using law of cosines: c <- sqrt(a^2 + b^2 -2*a*b*cos(gamma)) since i am calculating a regression model, i need derivation of this

Dear, I am trying to visualise a time-progressing line (it's supposed to represent spread patterns) using brew package and Google Earth. The idea is to have a function which takes start and end point geographic coordinates, as well as number of intervals to chop the path up, and returns the collection of points segmenting this line. Unfortunately my calculations fail for large distances,

Dear R useRs, I have a problem with nls.lm function of minpackl.lm package. I need to fit the Van Genuchten Model to a set of data of Theta and hydraulic conductivity with nls.lm function of minpack.lm package. For the first fit, the parameter estimates keep changing even after 1000 iterations (Th) and I have a following error message for fit of hydraulic conductivity (k); Reason for

Full_Name: Georgi Boshnakov Version: 2.10.1pat OS: Windows XP Submission from: (NULL) (130.88.123.205) When calling programmatically function curve() from package:graphics I experienced some trouble since it reports stop("'expr' must be a function or an expression containing 'x'") even if expr is "expression". Naturally, the user message uses

I recently began hacking around with my first LLVM pass. The big picture is that I would like to insert function calls for each instruction type, and pass some parameters based on the instruction type. Then I will link the output to some C file that implements those functions. Things were going well until I started trying to make function calls with a pointer as a parameter. For example, I would

How would I numerically find the x value where the derivative of the function below is zero? x <- seq(1,2, by = .01) y <- 5*cos(2*x)-2*x*sin(2*x) plot(x,abs(y), type = "l", ylab = "|y|")

Hello, Here's an example that renders correctly using Rd2txt / Rd2latex / R CMD Rd2pdf, but has problems under Rd2HTML: \name{foo} \title{foo} \section{foo}{ This should be on a separate paragraph This should be on a separate paragraph This should be on a separate paragraph \Sexpr[stage=render,results=rd]{ paste( rep('Sexpr: This should be on a separate

Hi: I am trying to implement interval arithmetic through llvm. I have a problem with the rounding mode with llvm.experimental.constrained.cos I have two pieces of codes: ; Function Attrs: norecurse nounwind readnone ssp uwtable define double @cosine_down(double returned) local_unnamed_addr #0 {   ; call the llvm intrinsic to perform downward cosine

# HG changeset patch # User Jim Fehlig <jfehlig@suse.com> # Date 1360861948 -3600 # Node ID 0f9c7503650fa1b1103b769e1129d66ff614b2ad # Parent cffb489a6df37d8d114e7d2d53a7a85d14e8f968 tools/xend: Only add cpuid and cpuid_check to sexpr once When converting a XendConfig object to sexpr, cpuid and cpuid_check were being emitted twice in the resulting sexpr. The first conversion writes

Hi all, On FC5, using: Version 2.3.1 Patched (2006-08-06 r38829) and today's R version 2.4.0 alpha (2006-09-19 r39397) with the following .Rnw file: \documentclass[10pt]{article} \begin{document} This line should print '2': \Sexpr{1 + 1} %% This line should NOT print '2': \Sexpr{1 + 1} \end{document} The \Sexpr in the second line is processed even though the

Hi all, On FC5, using: Version 2.3.1 Patched (2006-08-06 r38829) and today's R version 2.4.0 alpha (2006-09-19 r39397) with the following .Rnw file: \documentclass[10pt]{article} \begin{document} This line should print '2': \Sexpr{1 + 1} %% This line should NOT print '2': \Sexpr{1 + 1} \end{document} The \Sexpr in the second line is processed even though the

I would like to create \examples{} in the manual dynamically, and while it is possible to do this with a \Sexpr at the top level, R CMD check issues a warning for it. (See below.) Is it intentional that \Sexpr is not allowed at the top level? The Rd grammar allows this, but R CMD check does not. Is there any other way to generate/modify the \examples{} section dynamically? Thanks, Gabor In

Dear List, First off, my deepest gratitude to the Sweave developers: this tool has improved my quality greatly. A question in my work I use \Sexpr{} statements scalar values and the xtable package for all manner of tables. What I'd like to do is to use a vector inline, rather than a whole separate table. Something like: %%%%%%%%%%%%%%%% begin code % Latex junk % Sweave block:

On Thu, Jul 12, 2018 at 12:23 PM Duncan Murdoch <murdoch.duncan at gmail.com> wrote: > > On 12/07/2018 6:33 AM, G?bor Cs?rdi wrote: > > I would like to create \examples{} in the manual dynamically, and > > while it is possible to do this with a \Sexpr at the top level, R CMD > > check issues a warning for it. (See below.) > > > > Is it intentional that

Hello, I very much enjoy "with" and "subset" semantics for data frames and was wondering if we could have something similar with split, basically by evaluating the second argument "with" the data frame : split.data.frame function(x, f, drop = FALSE, ...){ call <- match.call( ) fcall <- call( "with", data = call[["x"]],

Hi: I am trying to create a dynamic latex table using \Sexpr{} but it's not evaluating it. I also tried the example below without Sweave and also fails. I have also copied the Sweave.sty to my working directory but nothing seems to work. Do I need to have certain package in order to run \Sexpr{}? \documentclass[a4paper]{article} \usepackage{C:/R/R-2.8.1/share/texmf/Sweave} \begin{document}