On Jul 5, 2011, at 08:00 , Johannes Graumann wrote:
Hello,
As prompted by B. Ripley (see below), I am transfering this over from R-User
...
For a package I am writing a function that looks like
test - function(Argument1=NA){
# Prerequisite testing
Simon,
Thanks for the great suggestion. I've written a skeleton assignment
function for data.table which incurs no copies, which works for this
case. For completeness, if I understand correctly, this is for :
i) convenience of new users who don't know how to vectorize yet
ii) more complex
L.S.
On 07/05/2011 02:16 AM, mark.braving...@csiro.au wrote:
I may have misunderstood, but:
Please could we have an optional installation that does not*not* byte-compile
base and recommended?
Reason: it's not possible to debug byte-compiled code-- at least not with the
'debug' package,
On 05/07/2011 6:52 AM, Tobias Verbeke wrote:
L.S.
On 07/05/2011 02:16 AM, mark.braving...@csiro.au wrote:
I may have misunderstood, but:
Please could we have an optional installation that does not*not*
byte-compile base and recommended?
Reason: it's not possible to debug byte-compiled
Dear Duncan,
On 07/05/2011 03:25 PM, Duncan Murdoch wrote:
On 05/07/2011 6:52 AM, Tobias Verbeke wrote:
L.S.
On 07/05/2011 02:16 AM, mark.braving...@csiro.au wrote:
I may have misunderstood, but:
Please could we have an optional installation that does not*not*
byte-compile base and
On 05/07/2011 10:17 AM, Tobias Verbeke wrote:
Dear Duncan,
On 07/05/2011 03:25 PM, Duncan Murdoch wrote:
On 05/07/2011 6:52 AM, Tobias Verbeke wrote:
L.S.
On 07/05/2011 02:16 AM, mark.braving...@csiro.au wrote:
I may have misunderstood, but:
Please could we have an optional
On 05/07/2011 11:20 AM, Stephan Wahlbrink wrote:
Dear developers,
Duncan Murdoch wrote [2011-07-05 15:25]:
On 05/07/2011 6:52 AM, Tobias Verbeke wrote:
L.S.
On 07/05/2011 02:16 AM, mark.braving...@csiro.au wrote:
I may have misunderstood, but:
Please could we have an optional
Dear developers,
Duncan Murdoch wrote [2011-07-05 15:25]:
On 05/07/2011 6:52 AM, Tobias Verbeke wrote:
L.S.
On 07/05/2011 02:16 AM, mark.braving...@csiro.au wrote:
I may have misunderstood, but:
Please could we have an optional installation that does not*not*
byte-compile base and
On 07/05/2011 04:21 PM, Duncan Murdoch wrote:
On 05/07/2011 10:17 AM, Tobias Verbeke wrote:
Dear Duncan,
On 07/05/2011 03:25 PM, Duncan Murdoch wrote:
On 05/07/2011 6:52 AM, Tobias Verbeke wrote:
L.S.
On 07/05/2011 02:16 AM, mark.braving...@csiro.au wrote:
I may have misunderstood, but:
Simon (and all),
I've tried to make assignment as fast as calling `[-.data.table`
directly, for user convenience. Profiling shows (IIUC) that it isn't
dispatch, but x being copied. Is there a way to prevent '[-' from
copying x? Small reproducible example in vanilla R 2.13.0 :
x =
On Jul 5, 2011, at 1:45 PM, Tobias Verbeke wrote:
On 07/05/2011 04:21 PM, Duncan Murdoch wrote:
On 05/07/2011 10:17 AM, Tobias Verbeke wrote:
Dear Duncan,
On 07/05/2011 03:25 PM, Duncan Murdoch wrote:
On 05/07/2011 6:52 AM, Tobias Verbeke wrote:
L.S.
On 07/05/2011 02:16 AM,
On 05/07/2011 1:45 PM, Tobias Verbeke wrote:
On 07/05/2011 04:21 PM, Duncan Murdoch wrote:
On 05/07/2011 10:17 AM, Tobias Verbeke wrote:
Dear Duncan,
On 07/05/2011 03:25 PM, Duncan Murdoch wrote:
On 05/07/2011 6:52 AM, Tobias Verbeke wrote:
L.S.
On 07/05/2011 02:16 AM,
On Jul 5, 2011, at 2:08 PM, Matthew Dowle wrote:
Simon (and all),
I've tried to make assignment as fast as calling `[-.data.table`
directly, for user convenience. Profiling shows (IIUC) that it isn't
dispatch, but x being copied. Is there a way to prevent '[-' from
copying x?
Good point,
I wouldn't expect so. The basic structure might be handled using a regexp of
sorts, but even that is tricky because of the dot not followed by number
rule, and then there's the stop list of reserved words, which would make your
code clumsy whatever you do.
How on Earth would you expect
On Tue, 5 Jul 2011, Matthew Dowle wrote:
Simon (and all),
I've tried to make assignment as fast as calling `[-.data.table`
directly, for user convenience. Profiling shows (IIUC) that it isn't
dispatch, but x being copied. Is there a way to prevent '[-' from
copying x? Small reproducible
On Tue, 5 Jul 2011, Simon Urbanek wrote:
On Jul 5, 2011, at 2:08 PM, Matthew Dowle wrote:
Simon (and all),
I've tried to make assignment as fast as calling `[-.data.table`
directly, for user convenience. Profiling shows (IIUC) that it isn't
dispatch, but x being copied. Is there a way to
On Tue, Jul 5, 2011 at 7:31 PM, steven mosher mosherste...@gmail.com wrote:
regexp approach is kinda ugly
http://www.r-bloggers.com/testing-for-valid-variable-names/
Hmm, I think that suggests a couple of small bug in make.names:
make.names(...)
[1] ...
make.names(..1)
[1] ..1
and
x -
regexp approach is kinda ugly
http://www.r-bloggers.com/testing-for-valid-variable-names/
On Tue, Jul 5, 2011 at 3:29 PM, Hadley Wickham had...@rice.edu wrote:
I wouldn't expect so. The basic structure might be handled using a regexp
of sorts, but even that is tricky because of the dot not
On June 30, 2011 01:37:57 PM Hadley Wickham wrote:
Is there any easy way to tell if a string is a syntactically valid name?
[...]
One implementation would be:
is.syntactic - function(x) x == make.names(x)
but I wonder if there's a more elegant way.
This is without quoting, right?
This is without quoting, right? Because make.names replaces spaces with
periods, and using quoting I can create syntactically valid names that do
include spaces:
`x prime` - 3
ls()
That's not a syntactically valid name - you use backticks to refer to
names that are not syntactically
On Jul 6, 2011, at 01:40 , Hadley Wickham wrote:
On Tue, Jul 5, 2011 at 7:31 PM, steven mosher mosherste...@gmail.com wrote:
regexp approach is kinda ugly
http://www.r-bloggers.com/testing-for-valid-variable-names/
Hmm, I think that suggests a couple of small bug in make.names:
On July 5, 2011 04:59:16 PM Hadley Wickham wrote:
That's not a syntactically valid name - you use backticks to refer to
names that are not syntactically valid.
I was too loose in my terminology: I meant that `x prime` is a valid name, but
as you said, it is not syntactically valid.
Davor
On Jul 5, 2011, at 7:18 PM, luke-tier...@uiowa.edu luke-tier...@uiowa.edu
wrote:
On Tue, 5 Jul 2011, Simon Urbanek wrote:
On Jul 5, 2011, at 2:08 PM, Matthew Dowle wrote:
Simon (and all),
I've tried to make assignment as fast as calling `[-.data.table`
directly, for user convenience.
No subassignment function satisfies that condition, because you can always call
them directly. However, that doesn't stop the default method from making that
assumption, so I'm not sure it's an issue.
David, Just to clarify - the data frame content is not copied, we are talking
about the
What's wrong with that? They are names alright, just with special meanings.
But you can't really use them for variables:
... - 4
...
Error: '...' used in an incorrect context
..1 - 4
..1
Error: 'nthcdr' needs a list to CDR down
And make.names generally protects you against that:
25 matches
Mail list logo
