You would have to add a custom button to the ribbon for each add-in feature you want to invoke. In 2007 it’s easy enough to add a button to the Quick Access Toolbar. Click the down triangle at the end of the QAT, select More Commands, choose Macros in the left dropdown, select the macro, and click Add. Select the newly added macro and click Modify to change the macro display name and button image (unfortunately it’s a very limited set, and I don’t know how to add more images from the user interface). In 2010 you can also add commands to the ribbon tabs.

We need to know some things before we can compare my utility’s results with those of S-plus.

1. Does S-plus use the same weighting factor for points, according to X distance from the output X value to the X values of the points used in the moving fit?
W(i) = (1 – X(i)^3)^3

2. Is S-plus using the same number of points or fraction of the dataset in its moving fit?

3. Are you comparing the S-plus results with my utility’s results on the same graph?