The straight way to get a table for your variable is the table command:

> table(Cond)

If you want to have a contingency table (one variable against one other), you just have to add it between the parentheses, with the independent variable as first argument:

> table(Mat,Cond)

Start · Data description · Transforming variables · Tables · Pictorial displays · Measures of position and variability · Sampling · Tests of difference · Tests of distribution · Correlation · Tests of association