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%% Create a Function to Handle an Extension % Create a function called |opentxt| to handle files with a |.txt| extension. % % <include>opentxt.m</include> % %% % Create a text file. dlmwrite('myTestFile.txt',[1,2,3,4]); %% % Read the data from the file. The |open| function calls the function % |opentxt| to open the file. open('myTestFile.txt');