Extensible Markup Language (XML) 1.0 (Fifth Edition) – 1 Introduction. Extensible Markup Language, abbreviated XML, describes a class of data objects called XML documents and partially describes the behavior of computer ……

Notes on the use of R for psychology experiments and … – Notes on the use of R for psychology experiments and questionnaires Jonathan Baron Department of Psychology, University of Pennsylvania Yuelin Li…

Using R for psychological research – The Personality Project – Using R for psychological research A simple guide to an elegant language. This is one page of a series of tutorials for using R in psychological research….

Using R for statistical analysis – Basics. Clear cache # clear the cache rm(list = ls()) Installing packages # the repositiory PA1 seems to be most stable (http://lib.stat.cmu.edu/R/CRAN) install ……

Hi Ruben, I see what is happening now. You have created a variable named “Group” that contains the numeric version of the Group column from the dataset….

Correlation, Variance and Covariance (Matrices) Description. var, cov and cor compute the variance of x and the covariance or correlation of x and y if these are vectors….

8 approxExtrap approxExtrap Linear Extrapolation Description Works in conjunction with the approx function to do linear extrapolation. approx in R does not…

Correlations . You can use the cor( ) function to produce correlations and the cov( ) function to produces covariances. A simplified format is cor(x, use=, method ……