search for: jlucke

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2017 Sep 30
4
Converting SAS Code
On 9/29/2017 3:37 PM, Rolf Turner wrote: > On 30/09/17 07:45, JLucke at ria.buffalo.edu wrote: > > <SNIP> > >> >> The conceptual paradigm for R is only marginally commensurate with >> that of >> standard statistical software. >> You must immerse yourself in R to become proficient. > > Fortune nomination. For newer...
2009 Oct 07
1
Unable to load rjags
....stat.cmu.edu/R/CRAN/bin/windows/contrib/2.9/rjags_1.0.3-10.zip' Content type 'application/zip' length 308968 bytes (301 Kb) opened URL downloaded 301 Kb package 'rjags' successfully unpacked and MD5 sums checked The downloaded packages are in C:\Documents and Settings\jlucke\Local Settings\Temp\RtmpRAkMZy\downloaded_packages updating HTML package descriptions BUT, > library(rjags) Error in fun(...) : Failed to locate JAGS 1.0.3 installation Error : .onLoad failed in 'loadNamespace' for 'rjags' Error: package/namespace load failed for 'rjags'...
2009 Nov 05
4
The equivalence of t.test and the hypothesis testing of one way ANOVA
I read somewhere that t.test is equivalent to a hypothesis testing for one way ANOVA. But I'm wondering how they are equivalent. In the following code, the p-value by t.test() is not the same from the value in the last command. Could somebody let me know where I am wrong? > set.seed(0) > N1=10 > N2=10 > x=rnorm(N1) > y=rnorm(N2) > t.test(x,y) Welch Two Sample t-test data:
2010 Mar 15
2
Stacking matrices
What is an easy way to stack a matrix multiple times? E.g. I have a 6x6 matrix that I need to stack vertically 154 times to get a 6*154 by 6 matrix. I would rather not rbind(X,X,...,X) matrices. --Joe [[alternative HTML version deleted]]
2017 Sep 29
0
Converting SAS Code
On 30/09/17 07:45, JLucke at ria.buffalo.edu wrote: <SNIP> > > The conceptual paradigm for R is only marginally commensurate with that of > standard statistical software. > You must immerse yourself in R to become proficient. Fortune nomination. cheers, Rolf -- Technical Editor ANZJS Department of...
2017 Sep 29
2
Converting SAS Code
I wish to second this approach to learning R. I tried for several years to translate other stat programs or provide parallel analyses with R. This dabbling-in-R approach did not work . When a transferred to a research unit that could ill afford commercial software, I devoted my entire time to doing everything in R. This was a difficult learning process, but I eventually became proficient
2017 Sep 30
0
Converting SAS Code
On 01/10/17 01:22, Robert Baer wrote: > > > On 9/29/2017 3:37 PM, Rolf Turner wrote: >> On 30/09/17 07:45, JLucke at ria.buffalo.edu wrote: >> >> <SNIP> >> >>> >>> The conceptual paradigm for R is only marginally commensurate with >>> that of >>> standard statistical software. >>> You must immerse yourself in R to become proficient. >>...
2009 Feb 11
1
Can't install rggobi package
I am unable to install the rggobi package. I do not have trouble installing other packages. Any advice or suggestions? >sessionInfo() R version 2.8.1 (2008-12-22) i386-pc-mingw32 locale: LC_COLLATE=English_United States.1252;LC_CTYPE=English_United States.1252;LC_MONETARY=English_United States.1252;LC_NUMERIC=C;LC_TIME=English_United States.1252 attached base packages: [1] stats
2009 Feb 13
1
Distinguishing variables from functions with the same name
guRus: I have a variable "beta" as an argument to R's beta function. So essentially I have a case of beta(alpha, beta). What surprises me is that R doesn't barf on this stupid programming practice. R gets the right answer. How does R know "beta the variable" from "beta the function"? Joseph F. Lucke Senior Statistician Research Institute on Addictions
2017 Sep 30
0
Converting SAS Code
...es ????? 'Exegeses on Linear Models' paper (May 2000) On Saturday, September 30, 2017, 4:57:23 PM EDT, Rolf Turner <r.turner at auckland.ac.nz> wrote: On 01/10/17 01:22, Robert Baer wrote: > > > On 9/29/2017 3:37 PM, Rolf Turner wrote: >> On 30/09/17 07:45, JLucke at ria.buffalo.edu wrote: >> >> <SNIP> >> >>> >>> The conceptual paradigm for R is only marginally commensurate with >>> that of >>> standard statistical software. >>> You must immerse yourself in R to become proficient. >>...
2017 Sep 30
1
Converting SAS Code
> On 30 Sep 2017, at 14:22 , Robert Baer <rbaer at atsu.edu> wrote: > > > > On 9/29/2017 3:37 PM, Rolf Turner wrote: >> On 30/09/17 07:45, JLucke at ria.buffalo.edu wrote: >> >> <SNIP> >> >>> >>> The conceptual paradigm for R is only marginally commensurate with >>> that of >>> standard statistical software. >>> You must immerse yourself in R to become proficient. >&...
2011 Mar 15
1
Bug in lattice auto.key argument
The Lattice auto.key argument has a bug in R.12.2. R version 2.12.2 (2011-02-25) Platform: i386-pc-mingw32/i386 (32-bit) .... other attached packages: [1] lattice_0.19-17 loaded via a namespace (and not attached): [1] grid_2.12.2 If I set up my plot parameters as require(lattice) superpose.line.settings <- trellis.par.get("superpose.line") str(superpose.line.settings)
2009 Jan 07
1
Cannot access packages
Although I have installed R many times on many machines without problems, I have recently encountered a problem with accessing packages. R has been installed successfully with the "--internet2" option. The session info is below. > sessionInfo() R version 2.8.1 (2008-12-22) i386-pc-mingw32 locale: LC_COLLATE=English_United States.1252;LC_CTYPE=English_United
2009 Dec 08
2
lm: RME vs. ML
windows XP R 2.10 As pointed out by Prof. Venables and Ripley (MASS 4th edition, p275), the results obtained from lme using method="ML" and method="REML" are often different, especially for small datasets. Is there any way to determine which method is preferable for a given set of data? Thanks, john John David Sorkin M.D., Ph.D. Chief, Biostatistics and Informatics
2010 May 24
2
[R-pkgs] New package: `lavaan' for latent variable analysis (including structural equation modeling)
Hi Yves lavaan looks like a very nice package. From the tutorial introduction I see you create path diagrams for some of the models you describe. How did you do this? I don't see a function for this in the package. I know there is a path.diagram function in the sem package that uses dot to draw the diagram, but I've always found the layouts from dot somewhat strange for path diagrams
2011 Mar 16
5
Strange R squared, possible error
k=lm(y~x) summary(k) returns R^2=0.9994 lm(y~x) is supposed to find coef. a anb b in y=a*x+b l=lm(y~x+0) summary(l) returns R^2=0.9998 lm(y~x+0) is supposed to find coef. a in y=a*x+b while setting b=0 The question is why do I get better R^2, when it should be otherwise? Im sorry to use the word "MS exel" here, but I verified it in exel and it gives: R^2=0.9994 when y=a*x+b is used
2010 Aug 12
3
Regression Error: Otherwise good variable causes singularity. Why?
This command cdmoutcome<- glm(log(value)~factor(year) > +log(gdppcpppconst)+log(gdppcpppconstAII) > +log(co2eemisspc)+log(co2eemisspcAII) > +log(dist) > +fdiboth > +odapartnertohost > +corrupt > +log(infraindex) > +litrate > +africa >
2009 Jan 28
2
t.test in a loop
Hi All, I've been having a little trouble with creating a loop that will run a a series of t.tests for inspection, Below is the code i've tried, and some checks i've looked at. I've used the get(paste()) idea as i was told previously that the use of the eval should try and be avoided. I've run a single syntax to check that my systax is correct and works without any problems