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Dear Sir, I am using R on Windows OS platform. I upgraded my R-system to version R-3.5.0. While upgrading my libraries in R as well as in RStudio, I am stuck up in the package 'data...

I am a Professor of Statistics at Indira Gandhi Krishi Vishwavidyalaya, Raipur, India. While teaching in class about analysis of variance using R, I was doing a one-way analysis for the two data-sets given below in the R...

Dear All, I have got your core message, that it is my responsibility to determine whether any particular function in my version of R satisfies the language requirements at the time of your use. Jim Albert and Maria Rizzo must...

Thanks for your kind reply. Problem is solved. However, it's "confidence interval / treatment comparison plot" is not taking main title. And the fonts of axes labels can not be changed using 'cex' parameter. I will appreciate if you could...

Dear Sir, I am a professor at Indira Gandhi Agricultural University, Raipur, Chhattisgarh, India. I have been teaching statistics in my department since 1986. Almost since the last 10 years, I have included R capabilities in doing practical-classes of...

Dear All, Thanks for your help. However, I would like to draw your attention to the following: Actually, I was replicating the Example 2.3, using the dataset "brainsize.txt" given in Section 2.3.3 ("Summarize by group") at...

Dear Peter, Thanks for your reply, and pointing out my mistake of misspelling in 'Permanganate' variable. However, it couldn't be detected because the same code, with misspelled variable at factor declaration level, ran successful ly till I upgraded to...

Dear Sirs, I am Professor at Indira Gandhi Krishi Vishwavidyalaya, Raipur, Chhattisgarh, India. While taking classes, I found the *by() *function producing following error when I use FUN=mean or median and some other functions, however, FUN=summary works. Given...

You are right. I do take backups. But, this time I was too sure that nothing will go wrong. But, this was over-confidence. I need to take more care in future. Thanks anyway. With regards, Dr. A.K. Singh...

Dear All, Yes, I certainly now agree with the suggestion of Adrian Dusa for using colMeans in place of mean in the situation that I had reported to r-help. And I am sorry that I did not personally extend...

My thanks to Dr. John Fox and Dr. Duncan Murdoch. But, I have upgraded all my R-3.4.3 libraries to R-3.5.0, and I have not backed-up copies of old version. So, I would give...

Dear learned experts of R, I was writing a book through RStudio-Rmarkdown and had finally compiled it successfully based on R package R-3.6.2. Afterwards, I updated my R-3.6.2 to R-4.0.0...