Re: [R] Error in str(its-object)
I'll update ITS to include that signature. Right now, the only signature for Arith is: signature(e1=its,e2=its). Thx, Whit -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Martin Maechler Sent: Tuesday, November 14, 2006 11:24 AM To: Stefan Albrecht Cc: r-help@stat.math.ethz.ch Subject: Re: [R] Error in str(its-object) StAl == Albrecht, Dr Stefan (AZ Private Equity Partner) [EMAIL PROTECTED] on Tue, 14 Nov 2006 15:36:45 +0100 writes: StAl Dear all, on my Windows XP R 2.4.0 version with StAl Package its version 1.1.4 I have a problem with str() StAl applied on an its-object after a simple matrix StAl manipulation on the its object (see below). I am not StAl sure, whether this a problem with my application, its StAl or str(). I'd say mainly with its, and then with R internal arithmetic. str() actually reveals that the object you produce is not ``valid'' anymore in a certain sense (see below). StAl .. But its object should be able to handle simple matrix StAl multiplications, even if the result is a matrix. Any StAl help is greatly appreciated. / 1 is not a simple multiplication. But I agree that package its (which you failed to mention) should make sure that ' itsObj / 1 ' should work -- which it does not. Here is a reproducible example script - extended from your transcript : -- (mat - matrix(1:6, 2,3, dimnames=list(c(2003-01-01,2003-01-04),letters[1:3]))) library(its) (im - its(mat)) str(im) isS4(im)# TRUE, of course, but .. isS4(im / 1)# FALSE !!! ## even though class(im / 1) ## shows ## [1] its ## attr(,package) ## [1] its ## and the reason comes from selectMethod(/, signature(e1 = its, e2 = numeric)) ## - .Primitive(/) -- So what happens is that the builtin arithmetic *does* work on the .Data slot automatically -- as it should IIRC the green book on this topic. What the builtin arithmetic *fails* to do, is keeping the S4-object bit. -- I'll post a version of this to R-devel, since I think we should consider improving the current behavior here. For the current version of R, the maintainer of its should really define Arith methods for signature(its, numeric) and signature(numeric, its). Martin Maechler, ETH Zurich __ R-help@stat.math.ethz.ch mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code. This e-mail message is intended only for the named recipient(s) above. It may contain confidential information. If you are not the intended recipient you are hereby notified that any dissemination, distribution or copying of this e-mail and any attachment(s) is strictly prohibited. If you have received this e-mail in error, please immediately notify the sender by replying to this e-mail and delete the message and any attachment(s) from your system. Thank you. __ R-help@stat.math.ethz.ch mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
Re: [R] RODBC sqlQuery insert slow
Is there a reason why the data have to be inserted 1 row at a time?
Is it possible to insert the entire table at once?
sqlSave perhaps.
-Original Message-
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] On Behalf Of Bill Szkotnicki
Sent: Friday, October 13, 2006 9:09 AM
To: [EMAIL PROTECTED]
Subject: [R] RODBC sqlQuery insert slow
Hello,
I am trying to insert a lot of data into a table using
windows R (2.3.1) and a mysql database via RODBC.
First I read a file with read.csv and then form sql insert
statements for each row and execute the insert query one row
at a time. See the loop below.
This turns out to be very slow.
Can anyone please suggest a way to speed it up?
Thanks, Bill
# R code
ntry=dim(ti)[1]
date()
nbefore=sqlQuery(channel,SELECT COUNT(*) FROM logger) for
(i in 1:ntry) { sql=INSERT INTO logger
(time,v1,v2,v3,v4,v5,v6,v7,v8,v9,v10) VALUES(
d1=strptime(ti[i,2],%d/%m/%y %H:%M:%S %p)
sql=paste(sql,',d1,' ) sql=paste(sql,,,ti[i,3] )
sql=paste(sql,,,ti[i,4] ) sql=paste(sql,,,ti[i,5] )
sql=paste(sql,,,ti[i,6] ) sql=paste(sql,,,ti[i,7] )
sql=paste(sql,,,ti[i,8] ) sql=paste(sql,,,ti[i,9] )
sql=paste(sql,,,ti[i,10])
sql=paste(sql,,,ti[i,11])
sql=paste(sql,,,ti[i,12])
sql=paste(sql,) )
#print(sql)
sqlQuery(channel, sql)
}
nafter=sqlQuery(channel,SELECT COUNT(*) FROM logger)
nadded=nafter-nbefore;nadded
date()
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[R] behavior of [-.foo
Can someone help me understand the following behavior of [- ?
If I define a simple class based on a matrix, the [- operation only
inserts into the first column:
x - matrix(rnorm(10),nrow=5,ncol=2)
class(x) - foo
[-.foo - function(x, i, j, value) {
+ if(missing(i)) i - 1:nrow(x)
+ if(missing(j)) j - 1:ncol(x)
+
+ x - unclass(x)
+ x - NextMethod(.Generic)
+ class(x) - foo
+ x
+ }
x[] - 100.0
x
[,1] [,2]
[1,] 100 -0.1465296
[2,] 100 -0.2615796
[3,] 100 -0.8882629
[4,] 100 -0.2886357
[5,] 100 -0.9565273
attr(,class)
[1] foo
Based on the behavior of [- for a matrix, I would have thought that the
data for the whole object would be replaced.
for instance:
y - matrix(rnorm(10),nrow=5,ncol=2)
y
[,1] [,2]
[1,] -0.55297049 -1.1896488
[2,] 0.06157438 -0.6628254
[3,] -0.28184208 -2.5260177
[4,] 0.61204398 -0.3492488
[5,] 0.43971216 1.8990789
y[] - 100
y
[,1] [,2]
[1,] 100 100
[2,] 100 100
[3,] 100 100
[4,] 100 100
[5,] 100 100
Thanks,
Whit
code for above:
x - matrix(rnorm(10),nrow=5,ncol=2)
x
class(x) - foo
[-.foo - function(x, i, j, value) {
if(missing(i)) i - 1:nrow(x)
if(missing(j)) j - 1:ncol(x)
x - unclass(x)
x - NextMethod(.Generic)
class(x) - foo
x
}
x[] - 100.0
x
R.Version()
$platform
[1] i686-pc-linux-gnu
$arch
[1] i686
$os
[1] linux-gnu
$system
[1] i686, linux-gnu
$status
[1]
$major
[1] 2
$minor
[1] 3.1
$year
[1] 2006
$month
[1] 06
$day
[1] 01
$`svn rev`
[1] 38247
$language
[1] R
$version.string
[1] Version 2.3.1 (2006-06-01)
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Re: [R] RODBC on linux
Thanks, everyone. I'll give freeTDS a try. Cheers, Whit -Original Message- From: Prof Brian Ripley [mailto:[EMAIL PROTECTED] Sent: Thursday, July 27, 2006 1:17 AM To: Marc Schwartz Cc: Armstrong, Whit; r-help@stat.math.ethz.ch Subject: Re: [R] RODBC on linux On Wed, 26 Jul 2006, Marc Schwartz wrote: On Wed, 2006-07-26 at 17:52 -0400, Armstrong, Whit wrote: Anyone out there using Linux RODBC and unixODBC to connect to a Microsoft SQL server? If possible can someone post a sample .odbc.ini file? I saw a few discussions on the archives a few years ago, but no config file details were available. Thanks, Whit Whit, Do you have a Linux ODBC driver for SQL Server? unixODBC is simply the driver manager, not the driver itself. MS does not offer (not surprisingly) an ODBC driver for Unix/Linux. There are resources available however and these might be helpful: http://www.sommarskog.se/mssql/unix.html Note that Easysoft provides (at a cost) an ODBC-ODBC bridge for Unix/Linux platforms which supports ODBC connections to SQL Server: http://www.easysoft.com/products/data_access/odbc_odbc_bridge/index.ht ml Several people have successfully used that, from the earliest days of RODBC: I believe it was part of Michael Lapsley's motivation to write RODBC. -- Brian D. Ripley, [EMAIL PROTECTED] Professor of Applied Statistics, http://www.stats.ox.ac.uk/~ripley/ University of Oxford, Tel: +44 1865 272861 (self) 1 South Parks Road, +44 1865 272866 (PA) Oxford OX1 3TG, UKFax: +44 1865 272595 This e-mail message is intended only for the named recipient(s) above. It may contain confidential information. If you are not the intended recipient you are hereby notified that any dissemination, distribution or copying of this e-mail and any attachment(s) is strictly prohibited. If you have received this e-mail in error, please immediately notify the sender by replying to this e-mail and delete the message and any attachment(s) from your system. Thank you. __ R-help@stat.math.ethz.ch mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
[R] deparse(substitute(foo))
I see that plot.default uses deparse(substitute(x)) to extract the
character name of an argument and put it on the vertical axis.
Hence:
foo - 1:10
plot( foo )
will put the label foo on the vertical axis.
However, for a function that takes a ... list as an input, I can only
extract the first argument name:
x - 1:10
y - 10:20
foo - function(...) {
print(deparse(substitute(...)))
}
foo(x,y)
returns:
foo(x,y)
[1] x
and when I try to convert the list to a local variable and then extract
names, that doesn't work either:
x - 1:10
y - 10:20
foo - function(...) {
x - list(...)
print(deparse(substitute(names(x
}
foo(x,y)
returns:
foo(x,y)
[1] names(list(c(1, 2, 3, 4, 5, 6, 7, 8, 9, 10), c(10, 11, 12, 13,
[2] 14, 15, 16, 17, 18, 19, 20)))
Can someone suggest a way to extract the variable names when they are
passed as a list via ... ?
Thanks,
Whit
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Re: [R] deparse(substitute(foo))
That works perfectly.
Thanks,
Whit
-Original Message-
From: Marc Schwartz [mailto:[EMAIL PROTECTED]
Sent: Thursday, July 27, 2006 8:41 AM
To: Armstrong, Whit
Cc: r-help@stat.math.ethz.ch
Subject: Re: [R] deparse(substitute(foo))
On Thu, 2006-07-27 at 08:18 -0400, Armstrong, Whit wrote:
I see that plot.default uses deparse(substitute(x)) to extract the
character name of an argument and put it on the vertical axis.
Hence:
foo - 1:10
plot( foo )
will put the label foo on the vertical axis.
However, for a function that takes a ... list as an input, I can
only extract the first argument name:
x - 1:10
y - 10:20
foo - function(...) {
print(deparse(substitute(...)))
}
foo(x,y)
returns:
foo(x,y)
[1] x
and when I try to convert the list to a local variable and then
extract names, that doesn't work either:
x - 1:10
y - 10:20
foo - function(...) {
x - list(...)
print(deparse(substitute(names(x
}
foo(x,y)
returns:
foo(x,y)
[1] names(list(c(1, 2, 3, 4, 5, 6, 7, 8, 9, 10), c(10, 11, 12, 13,
[2] 14, 15, 16, 17, 18, 19, 20)))
Can someone suggest a way to extract the variable names when they are
passed as a list via ... ?
Thanks,
Whit
Try this:
x - 1:10
y - 10:20
foo - function(...) {
sapply(match.call()[-1], deparse)
}
foo(x, y)
[1] x y
HTH,
Marc Schwartz
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[R] FW: RODBC on linux
Thanks again for everyone's help. I have a successful configuration. I used the ODBC-combined configuration which is documented here: http://freetds.org/userguide/odbcombo.htm here are the config files residing in my home dir: -bash-2.05b$ cat .freetds.conf [global] tds version = 7.0 [QAI] host = Mqa3.xxx.yyy.com port = 1433 -bash-2.05b$ -bash-2.05b$ cat .odbc.ini [ODBC Data Sources] QAIdsn = QAI database [QAIdsn] Driver = /usr/local/freetds-0.64/lib/libtdsodbc.so Description = QAI database Trace = No Servername = QAI Database= qai [Default] Driver = /usr/local/freetds-0.64/lib/libtdsodbc.so -bash-2.05b$ Cheers, Whit This e-mail message is intended only for the named recipient(s) above. It may contain confidential information. If you are not the intended recipient you are hereby notified that any dissemination, distribution or copying of this e-mail and any attachment(s) is strictly prohibited. If you have received this e-mail in error, please immediately notify the sender by replying to this e-mail and delete the message and any attachment(s) from your system. Thank you. __ R-help@stat.math.ethz.ch mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
[R] RODBC on linux
Anyone out there using Linux RODBC and unixODBC to connect to a Microsoft SQL server? If possible can someone post a sample .odbc.ini file? I saw a few discussions on the archives a few years ago, but no config file details were available. Thanks, Whit This e-mail message is intended only for the named recipient(s) above. It may contain confidential information. If you are not the intended recipient you are hereby notified that any dissemination, distribution or copying of this e-mail and any attachment(s) is strictly prohibited. If you have received this e-mail in error, please immediately notify the sender by replying to this e-mail and delete the message and any attachment(s) from your system. Thank you. [[alternative HTML version deleted]] __ R-help@stat.math.ethz.ch mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
