Rashmi - if you have created your GUI with GUIDE, then use the handles structure that is the third input to the push button callback to grab the data from the uitable
function pushbutton1_Callback(hObject, eventdata, handles)
data = get(handles.uitable1,'Data')
Here we assume that the push button is named pushbutton1 and that the uitable is named uitable1. data is a cell array containing all data from the uitable.
