Displaying 20 results from an estimated 22 matches for "strumila".
2001 Jan 04
6
regression constraints?
gday R gurus,
I have a multivariate regression for which I want to constrain the
coefficients to be > 0. Is this possible?
I've check the doco and searched CRAN but can't find anything.
thanks,
John Strumila
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2000 Jul 20
3
printing hclust with k clusters
howdy R friends,
I've searched CRAN but to no avail... I'm trying to use mva's hclust and
print out for say 10 clusters in batch. How do I do this? It's unclear if
I can use cutree.
thanks,
John Strumila
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2000 Aug 31
3
cant find "get"?
...wdy gurus,
I was wondering if someone could help me with what looks like a simple
problem.
I found this great function called "get" which allows me to work out my
object name at run time. Unfortunately it's not letting me assign values
with it. What am I doing wrong?
thanks,
John Strumila
> names(get(file.name))[1]
[1] "X14.59.23"
> names(get(file.name))[1] <- "date"
Error: couldn't find function "get<-"
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2000 Aug 17
2
R on os390
G'day R friends,
I didn't get any replies on the main list so I thought I'd try with the
experts.
I was wondering if anyone's ported R to os390. If so, are the vsize and
nsize limits the same as other platforms?
I could really annoy those SAS guys then.
thanks,
John Strumila
john.strumila@team.telstra.com
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2000 Feb 24
1
queueing problems
...to approach this?
I have some response time data I want to 'correlate' with other data. I
believe queueing is involved so I need to prove somehow (F test?) that
response ~ exponential(...)
How do I go about this? I cant find exponential in 'nlm' or other
functions.
thanks,
John Strumila
john.strumila at corpmail.telstra.com.au
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2000 Mar 03
1
tapply, sorting and the heap
howdy gurus,
I'm new and green and I was hoping for a tiny bit of your expertise.
I'm running out of virtual memory (heap?) when summing using tapply. I've
already used --vsize=90M on my hpux machine. (details below)
Can I pre-sort or something to prevent my error?
thanks,
John Strumila
john.strumila at corpmail.telstra.com.au
> gc()["Vcells","total"]
[1] 11796480
> gcinfo(TRUE)
[1] FALSE
> t1<-tapply(trace$elapsed,list(trace$pid,trace$hv,trace$transno),sum)
Garbage collection [nr. 11]...
104285 cons cells free (41%)
90082 Kbytes of heap free (98%...
2000 Jul 26
3
merge aint merging
g'day R friends,
can anyone please help me with a frustrating merge?
The number of rows of a resulting merge is the smaller of the 2 dataframes
used as input. What am I doing wrong? I'm using 1.1.0 on redhat 6.2
thanks,
John Strumila
> xx[1:10,]
datetime c
948992940 948992940 0
948993000 948993000 0
948993060 948993060 0
948993120 948993120 0
948993180 948993180 0
948993240 948993240 0
948993300 948993300 0
948993360 948993360 0
948993420 948993420 0
948993480 948993480 0
> yy[1:10,]
datetime c...
2001 Jan 11
1
lm variable name limit?
gday R gurus,
has anyone seen this lm problem?
When I add 2 bytes to the variable name (via names), lm returns an error.
It's as if there's a limit to the size of the variable names.
Any suggestions?
thanks,
John Strumila
> names(y)[12:14]
[1] "Log.SQLServer.Locks.RID.Lock.Wait" "Log.SQLServer.Lock"
[3] "xxaa"
> names(y)[12]<-"Log.SQLServer.Locks.RID.Lock.Wa"
>
my.formula<-as.formula(paste(paste("y$",names...
2001 Feb 19
1
ghostscript errors
...grade.
After upgrading to gs6.5 I've had problems. Originally, gs failed
complaining about lack of "__sysconf" in glibc2.2 so I upgraded glibc. Now I
get this. Note that it used to work with gs6.01.
I realise this is probably a ghostscript problem but you never know...
thanks,
John Strumila
> plot(hc, hang=-1)
Error: /invalidfont in findfont
Operand stack:
Helvetica Font Helvetica 236274 Helvetica --nostringval-- Courier
NimbusMonL-Regu (NimbusMonL-Regu) NimbusMonL-Regu (NimbusMonL-Regu)
NimbusMonL-Regu
Execution stack:
> %interp_exit .runexec2 --nostringval-- --nostringval...
2000 Sep 04
3
somebody's stolen my probabilities
...t;|t|)" but coef doesn't. How do I get
hold of these probabilities within an object? There doesn't seem to be an
appropriate attribute within the object - I was hoping for something like
"my.lm$probabilies".
I was hoping to grab the best t scores at run-time.
thanks,
John Strumila
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2001 May 01
3
Factor Analysis
Thanks to Brian Ripley for the time and effort put into developing the
factanal package for R. I have found it very useful. However, in trying to
replicate some results from previous research, I have run into the need for
a couple of extensions and was wondering if they might find their way into
future implementations.
1. Though maximum likelihood estimates might be more rigorous and
2000 Jun 13
2
command history under cursor keys
...friends,
I was hoping someone could provide me with advice as to my dysfunctional
'arrow' keys.
Instead of browsing thru my command history they just move my cursor. What
have I done wrong? My TERM seems ok for other unix apps.
I'm running under hpux 10.20 with R1.0.0
thanks,
John Strumila
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2000 May 22
6
handling dates
...owdy R friends,
Can anyone help me with converting a ''unix'' date (seconds since 1970) into
something readable?
There doesn''t seem to be anything in the ''date'' package and the prospect of
calculating this myself doesn''t excite me.
thanks,
John Strumila
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2002 Apr 08
4
pooling categories in a table
I have a large n-way contingency table, constructed as a table
object, and want to pool (collapse) some categories, summing the
frequencies in all collapsed cells. How can I do this?
thx,
-Michael
--
Michael Friendly friendly at yorku.ca
York University http://www.math.yorku.ca/SCS/friendly.html
Psychology Department
4700 Keele Street Tel: (416) 736-5115
2000 Aug 16
0
R on os390
G'day R friends,
I was wondering if anyone's ported R to os390. If so, are the vsize and
nsize limits the same as other platforms?
I could really annoy those SAS guys then.
thanks,
John Strumila
john.strumila at team.telstra.com
-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-
r-help mailing list -- Read http://www.ci.tuwien.ac.at/~hornik/R/R-FAQ.html
Send "info", "help", or "[un]subscribe"
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2002 Jan 07
1
internet2 and proxies
...tell it's using the wininet
calls because it's asking about authentication but how do I tell it my
username/password?
The help file only talks about user/pw for non wininet and I've searched
cran. I thought wininet should prompt me via a dialog box. I'm running
ie5.
thanks,
John Strumila
> {a <- CRAN.packages()
+ install.packages(select.list(a[,1],,TRUE), .libPaths()[1], available=a)}
trying URL `http://cran.r-project.org/bin/windows/contrib/PACKAGES'
Error in download.file(url = paste(contriburl, "PACKAGES", sep = "/"), :
cannot open: HTTP...
2000 Oct 04
5
postscript preview
...dhat which gives
me postscript. postscript is ideal but doesn't contain a preview so I can't
see it in msword.
Is there a way of sticking a preview into postscript?
If I ignore vector graphics and use png/jpeg I get x11 colormap limitations.
Is bitmap my only alternative?
thanks,
John Strumila
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2000 Jul 13
0
chron printing and plotting
...ren't shown, but if I use plot on the
time object only, the x-axis is sorted incorrectly.
> times(c("22:00:00","23:00:00","0:00:00"))
[1] 22:00:00 23:00:00 00:00:00
> plot(times(c("22:00:00","23:00:00","0:00:00")))
thanks,
John Strumila
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2001 Mar 11
2
Kaplan-Meier for left-truncated, right-censored data
Is it possible to calculate Kaplan-Meier for left-truncated,
right-censored data using survival5?
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2000 Sep 21
2
adjacency matrix
Hi all;
I have two vectors A=c(5,2,2,3,3,2)
and B=c(2,3,4,5,6,1,3,2,4,3,1,5,1,4,6,1,4)
and I want to make the following matrix
using the information I have from the above
vectors.
0 1 1 1 1 1
1 0 1 0 0 0
0 1 0 1 0 0
1 0 1 0 1 0
1 0 0 1 0 1
1 0 0 1 0 0
so the first vector says that I have 6
elements therefor I have to make a
6 by 6 matrix and then I have to read
5 elements from the