You make Stacked Bar and Line graphs just like Bar and Line graphs, but the Y values from previous data sets are accumulated into the Y values of the data set currently being plotted. Thus, the bars in a Stacked Bar graph will appear to be stacked upon each other. This is most easily seen with an example:
Enter the following data into the new NExS spreadsheet:
1 1 1 2 2 1 3 3 1 4 4 1 5 5 1 6 6 1 7 7 1
Select the range . The columns will now be highlighted. Select New Graph from the Graph menu and display its submenu. Select Stacked Graph from the New Graph submenu. NExS displays a window containing the Stacked Bar graph shown in Figure 13.8.
Figure 13.8: Stacked Bar Graph