similar to: Reverse plot axes with xlim=rev(range(x)) fails with asp=1

If I have a list I can set a sub-element as follows on the command line: people=list() people$tom$hair="brown" people But what if I have a string containing the name of the sub-element that I want to access? subel= "people$tom$hair" get(subel) # returns error assign(subel,"red") # silent but doesn't change list people The attempts above using assign/get

Dear R Users, I want to test the dimensions of an incoming vector, matrix or array safely and succinctly. Specifically I want to check if the unknown object has exactly 2 dimensions with a specified number of rows and columns. I thought that the following would work: > obj=matrix(1,nrow=3,ncol=5) > identical( dim( obj) , c(3,5) ) [1] FALSE But it doesn't because c(3,5) is numeric

Hello, Does anyone know of an R package that can read Windows BMP format images? Many thanks, Greg Jefferis. -- Gregory Jefferis, PhD Division of Neurobiology MRC Laboratory of Molecular Biology, Hills Road, Cambridge, CB2 0QH, UK. http://www2.mrc-lmb.cam.ac.uk/group-leaders/h-to-m/g-jefferis

Dear R People, I would like to smooth some 3d lines, which consist of line segments specified by start and end 3d coordinates. These are experimentally derived from microscope images of neurons, so there is no sense in which one axis is any different from any other (predictor vs response). I have tried doing repeated smoothing interpolation with smooth.splines (see below), but this doesn't

Dear R people, I have recently started using rJava to interact with Java code that I have written and am finding it a very useful bridge. Thanks! I have now run into a problem I can't figure out. If I edit and recompile my java source code I would like to force rJava to reload the modified java class. However even doing: .jinit(force.init=TRUE) To restart the jvm doesn't seem to do

Dear R Users, I have some data that is very similar in form to a 3D image - ie univariate data on a regular 3D grid. I keep this as a 3D numeric array in R with attributes describing the sampling points along the 3 dimensions. I would like to interpolate this onto a new regular 3D grid that I specify (eg by supplying 3 vectors corresponding to the new grid locations on each of the 3

Dear List, I have been trying to use library sm to do density estimation on a 3D dataset. I am using the current MacOS X binary of sm from CRAN. If I do this on a 2D dataset, sm.density returns a list including the component "estimate" which contains the density estimate over a uniform grid. When doing this with 3D data, although I get a nice plot (even when I don't ask for one),

Dear Colleagues, I would like to provide a CITATION file for my package nat.nblast [1]. I have the correct citation in BibTeX format [2]. How can I convert this BibTeX to the format needed by R for a package CITATION file (I have a lot of other packages needing citations ...). I think what I need is the opposite of RefManageR::toBiblatex [3]. This seems like it should be a common need, so I

Dear R-devel, Can anyone help me to understand this? It seems that subscripting the rows of a data.frame without actually changing their order, somehow changes an internal representation of row.names that is revealed by e.g. dput/dump/serialize I have read the docs and inspected the (R) code for data.frame, rownames, row.names and dput without enlightenment. df=data.frame(a=1:10, b=1)

Dear R developers, I would like to add a new S3 generic to override a function in a user package, specifically: STAR::as.repeatedTrain I have followed the recommendation here: http://cran.r-project.org/doc/manuals/R-exts.html#Adding-new-generics doing this: as.repeatedTrain<-function(x,...){ UseMethod("as.repeatedTrain") } as.repeatedTrain.default<-function(x,...) {

Hello, I have a binary file type that includes a zlib compressed data block (ie not gzip). Is anyone aware of a way using base R or a CRAN package to decompress this kind of data (from disk or memory). So far I have found Rcompression::decompress on omegahat, but I would prefer to keep dependencies on CRAN (or bioconductor). I am also trying to avoid writing yet another C level interface to

On Thu, 30 May 2019, Dr Gregory Jefferis wrote: > Dear Colleagues, > > I would like to provide a CITATION file for my package nat.nblast [1]. > > I have the correct citation in BibTeX format [2]. How can I convert this > BibTeX to the format needed by R for a package CITATION file (I have a > lot of other packages needing citations ...). (1) You can use read.bib() from the

the details section of ?image says: > If useRaster is not specified, raster images are used when the > getOption("preferRaster") is true, the grid is regular and either > dev.capabilities("raster") is "yes" or it is "non-missing" and there > are no missing values. but in my experience this is never the case and

This seems to be a simple problem, and I feel that there ought to be a simple answer, but I can't seem to find it. I have a function that returns a number of values as a heterogeneous list - always the same length and same names(), but a number of different data types, including character. I want to apply it to many inputs, resulting in a list of lists. I would like to turn this list of

Dear List Members, I'm presently carrying out morphological analysis of a data set of neuronal structures. These are essentially 3D binary trees. In due course I will be trying to use discriminant analysis or other methods to classify these neurons based on morphological variables such as total tree length, segment number etc. I would like to calculate a 3D convex hull for a set of X,Y,Z

In plot(), when using option asp=1 the xlim and ylim have no effect because they are changed changed in order to fill the whole plot region. Is there a way to automatically set xlim and ylim when asp has been set to 1? For example: #This is a box of the plot ranges I want: boxxy=rbind(c(-1,2),c(-1,-1),c(1,-1),c(1,2),c(-1,2)) #Without asp=1 I get what I want (i.e. I can't see the box because it

Hello Laurent, Ray and Greg, I tried the gmake settings. Yet, I still got an Error code 1 message when I run the test. running regression tests don't know how to make ../library/base/R/base (bu42). *** Error code 1 (bu21) Thanks you if you have any idea. Manuel -----Message d'origine----- De : Laurent Gautier [ mailto:laurent at genome.cbs.dtu.dk <mailto:laurent at

Dear R Users, This is only partly an R question, but I would be very grateful if anyone could offer some suggestions for approaches or packages I could use in R. I have 11 sets of points in 3D (synapses in a region of a fly's brain for 11 different kinds of neurons as it happens); each set has between 80-250 points distributed in an irregularly shaped cloud. I would like to calculate a) a

Dear R contributors, I recently dowloaded the R-1.3.1 on my SGi Origin 200 run by Irix6.5. In order to instal it, I launched the command shown below: env MAKE=gmake ./configure The output was as follow:: R is now configured for mips-sgi-irix6.5 Source directory: . Installation directory: /usr/local C compiler: cc -OPT:IEEE_NaN_inf=ON -g C++ compiler:

Dear Dr Hornik / R help list, I am using the mda package and in particular the fda routine to classify a set of 162 neurons falling in to 11 neuronal cell types according to 17 morphological variables. I would like to use a cross-validation approach in which I split the data, train with one part amd then test the predictive accuracy of the discriminant functions with the remaining part. However