Laurie - you need to set the Data property of the uitable1 with the data. There is no rawdata property that you can access (and so are probably observing some kind of error). Try the following instead
set(handles.uitable1, 'Data', rawdata);
The syntax for set is to supply the handle, then the property name, and then the data that you wish to update the property with. If rawdata is a single column then presumably only the first column (in the table) will be updated.
