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Thanks! Exactly what I wanted. Ravi -- View this message in context: http://n4.nabble.com/Shapiro-Wilk-for-levels-of-factor-tp1555254p1555720.html Sent from the R help mailing list archive at Nabble.com.

Of course! Works fine now. Thanks, Martyn and Jim... Ravi -- View this message in context: http://r.789695.n4.nabble.com/Scope-of-variable-tp3381485p3381932.html Sent from the R help mailing list archive at Nabble.com.

The ROCR package has methods to compute AUC and related methods. You might want to check it out. Ravi -- View this message in context: http://n4.nabble.com/roccomp-tp1748818p1748903.html Sent from the R help mailing list archive at...

Hello, I have data for an ANOVA where the between-subjects factor has three levels. How do I run a test of normality (using shapiro.test) on each of the levels of the factor for the dependent variable separately without...

How do I use the "extra" information that two of my predictors are ordinal? (I did not know I could do that.) Thanks, Ravi -- View this message in context: http://n4.nabble.com/Coding-of-categorical-variables-for-logistic-regression...

I forgot to reply to Peter Ehler's question: I am using Levene's test in the "car" package. Ravi -- View this message in context: http://n4.nabble.com/Difference-in-Levene-s-test-between-R-and-SPSS-tp1555725p1556016.html...

It's probably binary data - which implies that you can only "read" it with the application that created it. What is the filename extension? Ravi -- View this message in context: http://n4.nabble.com/Help-I-turned-my-data-into...

Apologies. I should have checked the archives first... I did not know that it was so widely discussed... Ravi -- View this message in context: http://n4.nabble.com/Type-I-v-s-Type-III-Sum-Of-Squares-in-ANOVA-tp1573657p1573734...

I do not know if this is what you want, but take a look at the "External links" at the bottom of the Wikipedia page: http://en.wikipedia.org/wiki/Theil_index Ravi -- View this message in context: http://r...

Can anyone give me links to reviews/comparisons of R with Amos for SEM? I have found some but they are a little old (2009). Ravi -- View this message in context: http://r.789695.n4.nabble.com/Structural-equation-modelling...

This is in version 2.10.1 > sqrt(3) [1] 1.732051 > 6/7 [1] 0.8571429 > options(digits=3) > sqrt(3) [1] 1.73 > 6/7 [1] 0.857 > sqrt(7) [1] 2.65 > 7/9 [1] 0.778...

I have tried looking for the source code for the pt() function in https://svn.r-project.org/R/trunk/src/library/stats/ and am unable to find it there. Can someone please tell me where to find it? Thanks...

Hello, Is a kernel called the "boundary" kernel available for kernel density plots? In the help, I can only see the following kernels: "gaussian", "rectangular", "triangular", "epanechnikov", "biweight", "cosine" or "optcosine". The boundary kernel apparently improves the estimate in a...

I think I have an answer: SPSS uses absolute deviations from the _mean_ in Levene's test. (See calculation in http://www.uvm.edu/~dhowell/gradstat/psych340/Lectures/Anova/anova2.html) R uses absolute deviations from the _median_ (R help...

Hello, Since I initiated this discussion some days ago, I discovered a paper that may be of interest: ANOVA for unbalanced data: Use Type II instead of Type III sums of squares by ?YVIND LANGSRUD Statistics and Computing 13: 163...

Yes, there does not seem to be a method for comparing two ROC curves in ROCR. But I found a discussion in the R-archives which may be useful: http://tolstoy.newcastle.edu.au/R/help/06/03/23667.html...

Hello, I am new to using Rmetrics. When I try to use the GoogleFinanceSource function thus: x <- GoogleFinanceSource('INFY') I get an error message saying; Error in get(name, envir = asNamespace(pkg), inherits = FALSE) : object '.Source' not found I am...

Use R Commander to do this. R Commander is a R package that offers a GUI for R. It can be downloaded like any other R package. If you use R Commander, there is a menu option where you specify...

Giving different colors to plots of different levels of a factor can be pleasing. For a boxplot, for example, the following produces a nice plot: boxplot(len~supp*dose, data=ToothGrowth, col=c(?orange?,?gray?)) If I try to specify...

I know this is not really an R question - it is a query about a recent book on R ("R In Action") by Robert Kabacoff, (Manning Publications 2011). There are many references to interesting topics in R in the book...