search for: bovy

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2004 Feb 12
1
Porting let* from Common LISP to R
...uate the initialization of its local variables in sequentially nested scopes, i.e. it provides an order to the binding and visibility of preceding variables.". I have included the recursive Common LISP function in which let* block appears and a straighforward R port. Thank you, Gabriel Baud-Bovy The let* block appears in the following LISP function: (defun infer (goal subsitution kb) (if(null kb) (make-empty-stream) (let* ((assertion (rename-variable (car kb))) ; ********* (match ([...]))) (if (equal match 'failed) (infer goal sub...
2005 May 10
1
Fwd: Re: Implementation of the names attribute of attribute lists
...c vector of type pairlist when accessed from R. The print.object function allows also to use the "typefun" function (but this is a detail). Regards, Gabriel >From: Martin Maechler <maechler@stat.math.ethz.ch> >Date: Tue, 10 May 2005 17:30:32 +0200 >To: Gabriel Baud-Bovy <baud-bovy.gabriel@hsr.it> >Subject: Re: [Rd] Implementation of the names attribute of attribute lists >X-Mailer: VM 7.18 under Emacs 21.3.1 >Reply-To: Martin Maechler <maechler@stat.math.ethz.ch> >CC: maechler@stat.math.ethz.ch >X-Virus-Scanned: by amavisd-new at stat.ma...
2003 Oct 27
1
Difficulties with R.oo (static fields, etc.)
...void syntax like tu<-forward(tu,10) which would be more typical of a functional language like R. From the doc/help files of R.oo, I believe that one could do it but I don't find many examples to guide me. I pasted my current code with comments below. Thank you for your help. Gabriel Baud-Bovy #--------------------------------------------------------------------------------------------------------------------- Description of Turtle Basic Class: private fields: .x, .y, .a (turtle position and heading) .turtle: ID of canvas item representing turtle static fields: .canvas: tcltk...
2004 Feb 03
3
Implementating streams in R
...eam) head.stream<-function(stream) car(stream) tail.stream<-function(stream) cdr(stream) > fibonacci.stream(0,1) Error in cons(expression, stream) : evaluation is nested too deeply: infinite recursion? } -------------------------------------------------------------------- Gabriel Baud-Bovy Faculty of Psychology UHSR University via Olgettina, 58 tel: (+39) 02 2643 4839 20132 Milan, Italy fax: (+39) 02 2643 4892
2003 Oct 14
1
"Turtle world" graphics in R
...is slow to update after each user command. PPS: I did ask a similar question 1 month ago but did not get any answer. Probably that my question was too long... I just would like to know if I am missing possibilites. -------------------------------------------------------------------- Gabriel Baud-Bovy Assistant Professor UHSR University via Olgettina, 58 tel: (+39) 02 2643 4839 20132 Milan, Italy fax: (+39) 02 2643 4892
2013 Nov 02
1
Cent OS 6.3 and free-nx
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 ??
2006 Dec 16
2
how to adjust link function in logistic regression to predict the proportion of correct responses in 2AFC task?
...ed as the point where the probit reaches the 0.75 probability level). Second, how can one implement a link function of the type f(x) = (1+exp(x)/(1+exp(x)))/2 in R? Third, can it be also done with gee and/or glmm? --------------------------------------------------------------------- Gabriel Baud-Bovy tel.: (+39) 02 2643 4839 (office) UHSR University (+39) 02 2643 3429 (laboratory) via Olgettina, 58 (+39) 02 2643 4891 (secretary) 20132 Milan, Italy fax: (+39) 02 2643 4892
2003 Sep 28
0
Turtle world
...ntersect" with the object. Is there any R package (tcl/tk, grid, RGL) that can be adapted to my needs? Is there R a package that does 2D graphics? If I need to do some programming in C, is there anything I could use as a starting point? Any idea, comment would be most welcome. Gabriel Baud-Bovy
2003 Oct 15
0
tkcanvas/bitmap for Turtle World
...)) turtle$angle <- angle } if(x!=turtle$x || y!=turtle$y) { tkmove(turtle$canvas,turtle$turtle,x-turtle$x,y-turtle$y) turtle$x <- x turtle$y <- y } turtle } -------------------------------------------------------------------- Gabriel Baud-Bovy Assistant Professor UHSR University via Olgettina, 58 tel: (+39) 02 2643 4839 20132 Milan, Italy fax: (+39) 02 2643 4892
2004 Feb 04
0
Implementing streams in R
...when we reached the second prime. By using the technique of delayed evaluation, we can use the elegant stream formulation while preserving the efficiency of incremental computation. [abridged from p. 260-261] Gabriel -------------------------------------------------------------------- Gabriel Baud-Bovy Faculty of Psychology UHSR University via Olgettina, 58 tel: (+39) 02 2643 4839 20132 Milan, Italy fax: (+39) 02 2643 4892
2005 May 10
0
Implementation of the names attribute of attribute lists
...} # print attriutes list print.object(attributes(x),typefun,print.attributes,deparse.level,"[attributes]",level+1) } invisible(NULL) } -------------------------------------------------------------------- Gabriel Baud-Bovy tel: (+39) 02 2643 4839 Faculty of Psychology, UHSR University fax: (+39) 02 2643 4892 via Olgettina, 58, 20132 Milan, Italy
2006 Dec 18
1
Applying variable labels across a data frame
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
2020 Aug 23
2
Apropos "shouting": PLEASE ATTACH THE FOLLOWING FILES TO THE BUG REPORT
Hi Stefan, You can find the contribution guidelines here : https://llvm.org/docs/Contributing.html LLVM also have code of conduct : https://llvm.org/docs/CodeOfConduct.html On Sun, 23 Aug 2020 at 23:28, David Blaikie via llvm-dev < llvm-dev at lists.llvm.org> wrote: > > > On Sun, Aug 23, 2020 at 10:54 AM Stefan Kanthak <stefan.kanthak at nexgo.de> > wrote: > >>