similar to: SEXP and slots

For using R's .Call interface to C functions, all the examples I've seen have the C function return type SEXP. Why? What does R actually do with this return type? What happens if I *don't* return a SEXP? Reason I ask, is I've written some R code which allocates two long lists, and then calls a C function with .Call. My C code writes to those two pre-allocated lists, thus, I

I have an external pointer object that I'd like to pass from my R code to some C code. Per Section 5.13 of "Writing R Extensions", I've noted that "external pointers should only be used as part of an object with normal semantics, for example an attribute or an element of a list." So I've written up a workable C function as such: SEXP my_c_function(SEXP param)

Dear R listers, I have developed a C function to be executed from R through the ".C" interface. After doing dyn.load, the function executes properly and I get the results. However, after executing my function, R seems to get unstable and crashes (giving a segmentation fault and exiting) whenever I try to do ANYTHING with a relatively large object (creating a new one or even just

Dear R listers, I have developed a C function to be executed from R through the ".C" interface. After doing dyn.load, the function executes properly and I get the results. However, after executing my function, R seems to get unstable and crashes (giving a segmentation fault and exiting) whenever I try to do ANYTHING with a relatively large object (creating a new one or even just writing

In the sample program below I have a form of 6 text fields, in a scrolling window, followed by a row of function buttons. Problems: 1) For data entry purposes I''d like the function buttons NOT to be entered by pressing Tab keys, and retain their ''clickability'', but when the user Tab''s out of the last scrolling field (postcode) to have the form scroll to the

Hello, I think there is an inconsistency in the handling of the compact form of the row.names attributes. When n is the number of rows of a data.frame, the compact form is c(NA_integer_,-n), as in: > d <- data.frame(x=1:10) > .Internal(inspect(d)) @104f174a8 19 VECSXP g0c1 [OBJ,NAM(2),ATT] (len=1, tl=0) @103a7dc60 13 INTSXP g0c4 [] (len=10, tl=0) 1,2,3,4,5,... ATTRIB: @104959380

Hi Kylie, For your question, I don't think a wrapper can completely solve your problem. The duplication occurs since your variable y has more than 1 reference number( Please see highlighted), so even you have a wrapper, any changes on the value of the wrapper still can trigger the duplication. > .Internal(inspect(y)) > @7fb0ce78c0f0 13 INTSXP g0c0 *[NAM(7)]* matter vector (mode=3,

I'm trying to set up sieve with dovecot, and for some reason, sieve is not getting the %d variable that is part of the path to where its script should be. Here's the version: ops:/var/log/mail# dovecot --version 1.2.13 And, here's the configuration (I've left it all for reference, but moved the lda & plugins portions together and marked them out):

Hello, I've created this class: setClass("example", representation ( size = "numeric", id = "character" ) ) Suppose I create a new instance of this class: > x <- new("example", 4, "id_value") This creates an S4 object with two slots. Am I correct in thinking that slots are "filled" by SEXPs?

If you start to experience problems with ata devices, please direct your report this way. Thanks -lq

Hi there all, I have problems compiling samba-1.9.18p10 on Solaris 2.6. I get the following error msgs when I make the Makefile, what am I missing?: Using CFLAGS = -O -DSMBLOGFILE="/usr/local/samba/var/log.smb" -DNMBLOGFILE="/usr/local/samba/var/log.nmb" -DCONFIGFILE="/usr/local/samba/lib/smb.conf" -DLMHOSTSFILE="/usr/local/samba/lib/lmhosts"

Hello, I have a simple question that I could not really figure out. I am plotting labels within a graph using the text function. I first plot the first label by specifying the x and y coordinates on the graph. Then to plot the second label next to it, I am using te strwidth function to get the width of the previous label in user coordinate then add the maximum width to the x value. However, this

Dear all, A few weeks ago I asked about X11() availability using CGI-perl. The general advice was to use bitmap which requires ghostscript (Xvnc and Xvbf were the other alternatives). My system administrator got around to installing Aladin Ghostscript 6.0 and the setting the R_GSCMD environment variable. Other system specification is given below. But now I have a new problem that says that font

Hello, Arel::SelectManager (arel 2.0.9) uses following statement to insert a new record: @engine.connection.insert im.to_sql, ''AREL'', primary_key_name, primary_key_value But in DatabaseStatements insert ist defined as: insert(sql, name = nil, pk = nil, id_value = nil, sequence_name = nil) Actually, Arel::SelectManager does not use the sequence name. This leads to issues

Hi, I'm a complete Wine newbie, still in the "Shock and Awe" stage... so apologies for obvious stupidities. I'm trying to run a VB6 app, probably 1999-vintage, under Wine. It is protected by a parallel port dongle from Aladdin. The app installs, the HASP drivers (latest version) apparently install, but when I run the app it tells me "HASP device driver not

dear sir, I need HASP4 aksusbd driver for IA 64 architecture for CentOS4.4. I tried to google-out and i can't find out the hasp driver Please, do the needful. regards, S.Balji.

Hello, Here''s the context: I read a number either pure integer or float with eventually up to 12 digits after the decimal point from a YAML file. The number is injected into a FXTextField with the following code: @value_sel = FXDataTarget.new(@value.to_s) @value_value = FXTextField.new(@matrix_mem_value, 20, at value_sel, :opts =>TEXTFIELD_NORMAL|JUSTIFY_RIGHT,

BioExplorer is a program for biofeedback. It comes with a USB dongle which must be plugged in for the program to start. The program automatically tries to install the drivers for Windows, but that doesn't work in Wine: The message "Cannot open HASP driver" appears when trying to run BioExplorer. I have installed the (completely up-to-date) run-time system including driver from

Hello, I?m experimenting with ALTREP and was wondering if there is a preferred way to create an ALTREP wrapper vector without using .Internal(wrap_meta(?)), which R CMD check doesn?t like since it uses an .Internal() function. I was trying to create a factor that used an ALTREP integer, but attempting to set the class and levels attributes always ended up duplicating and materializing the

Dear List, I need to make an Aladdin eToken Pro visible in a Linux guest HVM, but I cannot assign the device to any domU, while it''s being blocked by the dom0. To avoid this trouble I would like to pass the whole USB bus to the domU directly, via PCI passthrough. Now I use xen 3.3.0 from xensource and xen kernel from Ubuntu 8.04 2.6.24-19-xen, because the xensource xen kernel