author: nick fieller

... with names including a $ symbol. So, if the command testresults<-t.test(x) is used to test the hypothesis that the mean of the vector x is 0 and store the complete results of the test in an object testresults, the value of the t ...

... Reading data from files The three main functions for reading tabular data from files are, read.table(), read.csv() and read.delim(). The first is used primarily for plain text files (i.e., with extension .txt or .dat), the second for ...

... 2, 2, by row-T)) [1] 1 > det (matrix (c (1,0,0,0, 1, 0, 0, 0, 1), 3, 3, by ... interchange two rows (columns) of a matrix A, then the determinant but not ... 2. Other properties of determinants (i) A' | = |A| (this follows from the fact ...