Marginal distribution of two-way tables

Well, I have been working through this section in the hope that it will enlighten me on performing chi-square analyses when we get to it later in the book. However, I have been getting alot of error messages from codes typed directly from the book, which has been pretty frustrating. Has anyone worked through the example on 3.1.3. When I type in x for some reason it will not display the entire array, so that when I try to calculate the sum for the rows I get error messages. I just wondered if anyone else had this problem, or whether it is just me, ARGH!!!!