Displaying 20 results from an estimated 5000 matches similar to: "large dataframes to ascii"
2002 Aug 10
2
package for saving large datasets in ASCII
Hi,
I have made a tiny package for saving dataframes in ASCII format. The
package contains functions save.table() and save.delim(), the first
mimics (not completely) write.table() and the second uses just
different default values, suitable for read.delim().
The reason I have written the functions is that I have had problems
with saving large dataframes in ASCII form. write.table() essentially
2018 Oct 16
2
invisible functions
The survival package, like many others, has several helper functions that are not declared
in the namespace, since their only use is to be called by other "main" functions of the
package.? This works well since the functions in the survival namespace can see them ---
without ::: arguments --- and others don't.
Until a situation I ran into this week, for which I solicit comments
2015 Jun 03
2
Problem with shared library and lapack under windows
Hi all,
I have a C function, say Cfun, that calls Lapack's DGEMM routine and I need
to create a shared library to use Cfun inside R. The C file is the following
#include<stdio.h>
#include<R.h>
#include<R_ext/Lapack.h>
void Cfun(double *res, double *X, int *n, int *q)
{
char *ptr_TRANSA, TRANSA='T', *ptr_TRANSB, TRANSB='N';
ptr_TRANSA=&TRANSA;
2017 Mar 31
2
How to write the same things as `opt` command in C++ API
Hi, I'm Ryo Ota. I'm using LLVM 3.8.1. I have a quesion about inlining
function in C++ API.
I'd like to inline some functions in a module in the same way as `opt
-inline` command. But my C++ code didn't work what I want to do.
For example, by using `opt -inline` command,`main.ll` is converted into the
`inlined.ll`(`opt` command worked what I want to do)
[main.ll (Not inlined)]
2003 Mar 30
1
[RFC][patch] dynamic rolling block and sum sizes II
Mark II of the patch set.
The first patch (dynsumlen2.patch) increments the protocol
version to support per-file dynamic block checksum sizes.
It is a prerequisite for varsumlen2.patch.
varsumlen2.patch implements per-file dynamic block and checksum
sizes.
The current block size calculation only applies to files
between 7MB and 160MB setting the block size to 1/10,0000 of
the file length for a
2009 Feb 24
3
All the products of common factors
This is a seemingly simple problem - hopefully someone can help.
Problem: we have two integers. We want (1) all the common factors, and
(2) all the possible products of these factors. We know how to get (1),
but can't figure out a general way to get (2).
Example: 40 and 80 have these factors: c(1,2,2,2,5) and c(1,2,2,2,2,5).
We can use match() to get the common factors c(1,2,2,2,5). What
2017 Jun 14
2
[WISH / PATCH] possibility to split string literals across multiple lines
Mark, that's actually a fair statement, although your extra operator
doesn't cause construction at parse time. You still call paste0(), but just
add an extra layer on top of it.
I also doubt that even in gigantic loops the benefit is going to be
significant. Take following example:
atestfun <- function(x){
y <- paste0("a very long",
"string for
2018 Oct 17
1
invisible functions
> 2. change cfun[[1]] <- quote(cord.work) to cfun[[1]] <-
> quote(survival:::cord.work). You say this will mess up your test bed.
> That suggests that your test bed is broken. This is a perfectly legal
> and valid solution.
Valid in a package, but forces code to call a loaded library version of a function rather than (say) a 'source'd user-space version that is under
2019 Nov 04
2
Questions on the R C API
Hi All,
I have some questions regarding the R C API.
Let's assume I have a function which is defined as follows:
R file:
myfunc <- function(a, b, ...) .External(Cfun, a, b, ...)
C file:
SEXP Cfun(SEXP args) {
args = CDR(args);
SEXP a = CAR(args); args = CDR(args);
SEXP b = CAR(args); args = CDR(args);
/* continue to do something with remaining arguments in "..."
2013 Apr 09
1
Solving an integral in R gives the error “The integral is probably divergent”
I am trying to solve an integral in R. However, I am getting an error when
I am trying to solve for that integral.
The equation that I am trying to solve is as follows:
$$ C_m = \frac{{abs{x}}e^{2x}}{\pi^{1/2}}\int_0^t t^{-3/2}e^{-x^2/t-t}dt $$
[image: enter image description here]
The code that I am using is as follows:
a <- seq(from=-10, by=0.5,length=100)
## Create a function to compute
2005 Jul 07
1
Tables: Invitation to make a collective package
Hi All,
I would like to make an invitation to make a collective package with all
functions related to TABLES.
I know that there are many packages with these functions, the original idea is
collect all this functions and to make a single package, because is arduous for
the user know all this functions broadcast in many packages.
So, I think that the original packages can continue with its
2011 Jul 05
2
Stuck ...can't get sapply and xmlTreeParse working
Can't seem to get the code below working. It gets stuck on line 24 inside the
function hm; comments show the line in question. The function hm is called
by sapply and is at the bottom of the code. Other stuff above line 24 works
correctly including the first couple of lines of the function hm. Should I
be using a different apply function or am I doing something wrong with
xmlTreeParse ?
2017 Sep 20
4
xfs not getting it right?
Hi,
xfs is supposed to detect the layout of a md-RAID devices when creating the
file system, but it doesn?t seem to do that:
# cat /proc/mdstat
Personalities : [raid1]
md10 : active raid1 sde[1] sdd[0]
499976512 blocks super 1.2 [2/2] [UU]
bitmap: 0/4 pages [0KB], 65536KB chunk
# mkfs.xfs /dev/md10p2
meta-data=/dev/md10p2 isize=512 agcount=4, agsize=30199892 blks
2017 Dec 29
3
winbuilder warning message wrt function pointers
I've recently updated the coxme package, which calls internal routines from the bdsmatrix
package.? (It is in fact mentioned as an example of this in the Extensions manual.)
The call connections are a blocks like this, one for each of the 9 called C routines.
void bdsmatrix_prod4(int nrow,??? int nblock,?? int *bsize,
??????????????????? double *bmat, double *rmat,
??????????????????? int
2012 Dec 17
2
Why does matrix selection behave differently when using which?
Dear R community,
I have a medium sized matrix stored in variable "t" and a simple function "
countRows" (see below) to count the number of rows in which a selected
column "C" matches a given value. If I count all rows matching all pairwise
distinct values in the column "C" and sum these counts up, I get the number
or rows of "t". If I delete the
2019 Jun 03
2
[PATCH 22/22] docs: fix broken documentation links
Le 30/05/2019 ? 01:23, Mauro Carvalho Chehab a ?crit?:
> Mostly due to x86 and acpi conversion, several documentation
> links are still pointing to the old file. Fix them.
>
> Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung at kernel.org>
> ---
> Documentation/acpi/dsd/leds.txt | 2 +-
> Documentation/admin-guide/kernel-parameters.rst | 6
2019 Jun 03
2
[PATCH 22/22] docs: fix broken documentation links
Le 30/05/2019 ? 01:23, Mauro Carvalho Chehab a ?crit?:
> Mostly due to x86 and acpi conversion, several documentation
> links are still pointing to the old file. Fix them.
>
> Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung at kernel.org>
> ---
> Documentation/acpi/dsd/leds.txt | 2 +-
> Documentation/admin-guide/kernel-parameters.rst | 6
2012 Mar 13
1
Visualising multiple response contingency tables
Dear R Help Community,
I have a question and an answer (based on reading this forum and online
research), but I though I should share both since probably there's a much
better way to go about my solution. My question is specifically about how
to best visualise multiple response contingency tables. What I mean by
'multiple response' is that the total number of responses per row of a
2017 Nov 06
2
[PATCH] v2v: rework free space check in guest mountpoints
- move the space needed by mountpoint mapping to an own function,
outside of the checking loop
- remove the minimum limit of 100M on partitions, since existing
partitions that we check (e.g. /boot) may be smaller than that
- in case /boot is not on a separate mountpoint, enforce the space check
on the root mountpoint instead, since it is where /boot is in that
case
---
v2v/v2v.ml | 55
2011 May 02
2
INSERT OR UPDATE
I'm trying to insert rows of a data.frame into a database table, or update where the key fields of a record already exist in the table. I've come up with a possible solution below, but would like to hear if anyone has a better solution.
# The problem demonstrated:
# Create a data.frame with test values
library(RODBC)
tbl <- data.frame(
key1 = rep(1:3, each = 2),
key2 =