Displaying 20 results from an estimated 10000 matches similar to: "Require"
2016 Dec 08
2
require(..., quietly=TRUE) does not suppress warning
Hi,
The `quietly` argument of `require` is documented as follows:
quietly: a logical. If ?TRUE?, no message confirming package
attaching is printed, and most often, no errors/warnings are
printed if package attaching fails.
However:
> require(foo, quietly=TRUE)
Warning message:
In library(package, lib.loc = lib.loc, character.only = TRUE, logical.return = TRUE, :
2016 Dec 08
1
require(..., quietly=TRUE) does not suppress warning
Well, I'm getting a warning (not an error) when the package doesn't exist.
I interpreted "most often" to mean that suppressing warnings/errors is why you'd most often use this argument, as most packages don't emit startup messages.
And technically there isn't a problem with attaching the package, since we don't even try to attach packages that don't exist.
2010 Jul 09
3
apply is slower than for loop?
I thought the "apply" functions are faster than for loops, but my most
recent test shows that apply actually takes a significantly longer than a
for loop. Am I missing something?
It doesn't matter much if I do column wise calculations rather than row wise
## Example of how apply is SLOWER than for loop:
#rm(list=ls())
## DEFINE VARIABLES
mu=0.05 ; sigma=0.20 ; dt=.25 ; T=50 ;
2011 Aug 29
3
replacing elements of a zoo object
Why doesn't this work?
x = zoo(1:5, as.Date('2001-01-01')+1:5)
x[as.Date('2001-01-05')]
x[as.Date('2001-01-05')] = 0
x
I think this is especially bad because it doesn't cause an error. It lets
you do something to x, but then you can't see x again to see what it did.
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2011 Dec 06
2
read.table performance
** Disclaimer: I'm looking for general suggestions **
I'm sorry, but can't send out the file I'm using, so there is no
reproducible example.
I'm using read.table and it's taking over 30 seconds to read a tiny file.
The strange thing is that it takes roughly the same amount of time if the
file is 100 times larger.
After re-reviewing the data Import / Export manual I think
2010 Apr 19
2
How to pass a list of parameters into a function
Does anyone know how to pass a list of parameters into a function?
for example:
somefun=function(x1,x2,x3,x4,x5,x6,x7,x8,x9){
ans=x1+x2+x3+x4+x5+x6+x7+x8+x9
return(ans)
}
somefun(1,2,3,4,5,6,7,8,9)
# I would like this to work:
temp=c(x3=3,x4=4,x5=5,x6=6,x7=7,x8=8,x9=9)
somefun(x1=1,x2=2,temp)
# OR I would like this to work:
temp=list(x3=3,x4=4,x5=5,x6=6,x7=7,x8=8,x9=9)
2011 Dec 07
1
RSPython installation
Does anyone know if Is there a way to manually install RSPython?
I get this error when I try to run the script from my DOS prompt.
V:\>R CMD INSTALL -c C:/Users/gene.leynes/Downloads/RSPython_0.7-1.tar.gz
* installing to library 'C:/Users/gene.leynes/Documents/R/win-library/2.13'
* installing *source* package 'RSPython' ...
**********************************************
2011 Feb 23
4
The L Word
I've been wondering what L means in the R computing context, and was
wondering if someone could point me to a reference where I could read about
it, or tell me what it's called so that I can search for it myself. (L by
itself is a little too general for a search term).
I encounter it in strange places, most recently in the "save" documentation.
save(..., list = character(0L),
2011 Sep 06
2
Possible to access a USB volume by name in windows
On the Mac it's pretty easy to get to a USB drive by name. For example the
following command works if you have a USB drive named "MYUSB"
setwd('/Volumes/MYUSB')
Is there a way to do the same thing in Windows (without knowing the drive
letter)?
Thanks!
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2011 Sep 26
4
Testing for arguments in a function
I don't understand how this function can subset by i when i is missing....
## My function:
myfun = function(vec, i){
ret = vec[i]
ret
}
## My data:
i = 10
vec = 1:100
## Expected input and behavior:
myfun(vec, i)
## Missing an argument, but error is not caught!
## How is subsetting even possible here???
myfun(vec)
Is there a way to check for missing function arguments, *and*
2011 Dec 07
2
curve fitted ... how to retreive data
Dear R users,
I have now managed to fit the curve using the thin plate spline as follows:
library(mgcv)
b <- gam(y~s(x1,x2,k=100),data =dat)
vis.gam(b)
What I want now is to get the fitted data for y and copy it so that I use it for further analysis.
Many thanks in advance
mintewab
2009 Jul 22
3
How to replace NAs in a vector of factors?
# Just when I thought I had the basic stuff mastered....
# This has been quite perplexing, thanks for any help
## Here's the example:
db1=data.frame(
olditems=c('soup','','','','nuts'),
prices=c(4.45, 3.25, 4.42, 2.25, 3.98))
db2=data.frame(
newitems=c('stew','crackers','tofu','goatsmilk','peanuts'))
2012 Jul 31
1
Ubuntu installation
I just followed the instructions on
CRAN<http://cran.r-project.org/bin/linux/ubuntu/README> to install
R on an Ubuntu instance.
sudo apt-get install r-base
Why does it install an old version of R? Can I install version 15.1?
I changed my sources.list to be a current cran mirror. I believe that I
have entered the URL correctly because at first I had it wrong (there was a
trailing
2011 Jan 13
1
PBSmodelling: Change the "edit" option of a widget
Is it possible to toggle the "edit" option of a widget?
I would like to make it so that when a user clicks on a boolean (like "use
constraints") it will lock or unlock the field in which they would enter the
constraints.
I can imagine redrawing the whole GUI using a function attached to the
boolean, but that's clunky and slow.
I tried changing the .PBSmod variable... but
2012 Aug 03
2
Recursive function calls
My apologies, I know that this is not a new problem, but I'm not sure how
to find the answer
I want to recursively loop over an object and trim trailing white space.
When I use this function on a list of data.frame I get output like this:
[1] "c(\" many spaces \", \" many spaces \")" "c(\" many spaces
\", \" many spaces
2011 Feb 04
4
aggregate function - na.action
Can someone please tell me what is up with na.action in aggregate?
My (somewhat) reproducible example:
(I say somewhat because some lines wouldn't run in a separate session, more
below)
set.seed(100)
dat=data.frame(
x1=sample(c(NA,'m','f'), 100, replace=TRUE),
x2=sample(c(NA, 1:10), 100, replace=TRUE),
x3=sample(c(NA,letters[1:5]), 100, replace=TRUE),
2009 Nov 02
4
Incremental ReadLines
I've been trying to figure out how to read in a large file for a few days
now, and after extensive research I'm still not sure what to do.
I have a large comma delimited text file that contains 59 fields in each
record.
There is also a header every 121 records
This function works well for smallish records
getcsv=function(fname){
ff=file(description = fname)
x <- readLines(ff)
2011 Dec 06
2
To Try or to TryCatch, I have tried to long
So after about 4 hours struggling with Try and TryCatch I am throwing in the
towel. I have a more complicated function that used logspline through
iterative distributions and at some point the logspline doesnt function
correctly for some subsets but is fine with others so I need to be able to
identify when the error occurs and stop curtailing the distribution and I
think this Try or TryCatch
2011 Jul 27
2
apply is making me crazy...
I have tried a lot of ways around this, but I can't find a way to make apply
work in a generalized way because it causes a failure whenever reduces the
dimensions of its output.
The following example is easier to understand than the question.
I wish it had a "drop=TRUE/FALSE" option like the "[" (and I wish I had
found the drop option a year ago, and I wish that I had 1e6
2015 May 09
1
PATCH: library(..., quietly=TRUE) still outputs "Loading required package: ..." (forgot to pass down 'quietly')
Calling library(..., quietly=TRUE) may still output:
Loading required package: <other pkg>
in some cases, e.g.
> library("R.utils", quietly=TRUE)
Loading required package: R.methodsS3
[...]
I traced this to base:::.getRequiredPackages2(), which forgets to pass
'quietly' to an internal library() call:
if (!attached) {
if (!quietly)