similar to: Porting let* from Common LISP to R

Dear all, I have an implementation of streams in R. The current implementation of delay() and force() is inspired from the LISP implementation found in Part VI "Languages for AI problem solving" of "Artificial Intelligence" by G. Luger. I have tested it with the Fibonacci example in the same book (see examples below). It works but I do run into a problem when I try to

I would like to use R.oo and tcltk to implement a Turtle World. I have encountered many problems because: 1) I am not sure how to implement static fields with R.oo 2) I am not sure how to implement a constructor that would call a function only for the first instance of a class (i.e., to initialize value of static fields only once) 3) I am not sure how to remove/delete cleanly existing

Hi Martin, Thanks for your reply. I am responding on r-devel to provide some examples of outputs of the function that I had list in the post-scriptum of my previous email (BTW, did my post went through the list? I subscribed only after mailing it). You wrote: >Just to ask the obvious: > > Why is using str() not sufficient for you and instead, > you use 'print.object'

Thanks to Prof Brian Ripley, Duncan Murdoch and Luke Tierney for your replies. In particular, I found Luke Tierney's info very useful. I just would like to answer Duncan Murdoch's question (what is a stream [Lazy list in Luke's implementation] in plain english?) in case it interests somebody else. In fact, I will quote from "Structure and Interpretation of Computer

I would greatly appreciate some idea about the best approach to make a graphical interface of for a turtle world in R. In the turtle environment, the user controls movements of a turtle through the command line (e.g. forward(10), turn(5), etc.). The turtle should be displayed in the new position and heading after each command. Also, the turtle's path and, possibly, objects (squares,

I have would like to use logistic regression to analyze the percentage of correct responses in a 2 alternative forced choice task. The question is whether one needs to take into account the fact expected probabilities for the percentage of correct responses ranges between 0.5 and 1 in this case and how to adjust the link function accordingly in R (see details below). Gabriel Subjects were asked

To represent a turtle inside a canvas (tcltk package), I have a serie of bitmaps representing the turtle heading in different directions and I would like to display the one that corresponds to the current direction of the turtle (function below). I have created with Paint a bitmap representing the turtle in BMP format and succeeded displaying it on canvas after converting it into XBM format

Hi All, I'm working on a class example that demonstrates one way to deal with factors and their labels. I create a function called myLabeler and apply it with lapply. It works on the whole data frame when I subscript it as in lapply( myQFvars[ ,myQFnames ], myLabeler ) but does not work if I leave the [] subscripts off. I would appreciate it if anyone could tell me why. The program below

Dear all, Internally, the attribute list appears to be implemented as an generic list vector with a names attributes (i.e., the attribute slot in the object's SEXPREC structure would point toward a VECTOR_SEXPREC representing a generic vector). > attributes(c(a=1)) $names [1] "a" > typeof(attributes(c(a=1))) [1] "list" From R, it appears as if the named list had

Folks, I found free-nx in the repositories and tried to install/use it I could not figure out how to get it working. I tried following directions on the wiki But I still could not get it working Feel free to contact me at stephen.bovy at teradata.com I am currenly using the official ns server on sles 11 sp3 Is their any direction on how to install free nx on sles ??

Hi everyone! I'm developing a Libvirt bindings for Common Lisp. The project is called "Lispvirt". I created this project because I was doing a project in Lisp to manage Virtual Machines. So, I needed to implement some code using C and set up Lisp to access those methods in C. This project was becoming a mess. The better scenario is using only Lisp. That's why I started to

Dear R-developers, I am trying to reproduce the autoconf.ac example from R-ext and fail. My autoconf file looks like this [autoconf.ac] # original by Friedrich Leisch, much changed by BDR AC_INIT([SBMLodeSolveR]) dnl Select an optional include path, from a configure option dnl or from an environment variable. AC_ARG_WITH([sbmlode-include],

Hi Lisp users, I'm a user of both Common Lisp and R (GNU R). I found R has a rich collection of statistical and numerical computation functions, while it is not as extensible as Lisp (Common Lisp). I considered Lisp-Stat but its only implementation is not in the usuall Common Lisp, and the available functions in CRAN are far richer than Lisp-Stat currently has. I want to know if there is

I came across a quite interesting post from Ross Ihaka, thought would be good to share it and get the opinion of folks around here. I am not sure where to post this for the R community but since it has to do with development I thought or R-devel Ross Ihaka Newsgroups: comp.lang.lisp From: Ross Ihaka <ih... at stat.auckland.ac.nz> Date: Wed, 23 Jan 2008 10:35:26 +1300 Local: Tues, Jan 22

Hi, I'm using R in Emacs and I'm interested in programatically knowing the details of all opened buffers; details such a buffer name, size, mode, and possibly associated filename. I've been able to write such a function in Emacs Lisp, but now I'd like to be able to call that function from R, or if that's not possible then calling it from C would be fine. Does anyone know if

I'm not an Emacs user, but the ESS-help mailing list (see ess.r-project.org) might be able to help with this. Duncan Murdoch On 10/11/2023 3:43 a.m., Iris Simmons wrote: > Hi, > > > I'm using R in Emacs and I'm interested in programatically knowing the > details of all opened buffers; details such a buffer name, size, mode, > and possibly associated filename.

I have written some programs in Common Lisp and I have been using SAS to pipe those programs to my lisp compiler in batch mode by using the %xlog and %xlst SAS commands. I wonder if there is in R a similar way to pipe commands to LISP so that all my work would be concentrated in R even when I have to call a LISP program? I have looked at the foreign library but this seems to adjust data types not

I mainly program in Common Lisp and use R for statistical analysis. While in R I miss the power and ease of use of Lisp, especially its many primitives such as find, member, cond, and (perhaps a bridge too far) loop. Has anyone created a package that includes R analogs to a subset of Lisp functions? Chris Elsaesser, PhD Principal Scientist, Machine Learning SPADAC Inc. 7921 Jones

Hi guys, there was a topic crossposted to comp.lang.scheme and comp.lang.lisp (started 18 Dec 2004) about usability of LLVM for Scheme and Lisp. Schemers gave some replies. sorry for long link: http://groups.google.de/groups?start=25&hl=de&lr=&group=comp.lang.scheme&selm=pan.2004.12.18.11.29.33.33249%40consulting.net.nz if link is skewed for you, just use google's group

Hi, if you run a server in your Emacs session you can use emacsclient to send a lisp call to the server. There's an example here: https://emacs.stackexchange.com/questions/54156/how-can-i-query-emacs-from-a-separate-process/54161#54161 Regards, Martin Gregory On 11/10/23 11:18, Duncan Murdoch wrote: > I'm not an Emacs user, but the ESS-help mailing list (see >