When you say "plot the data", can you provide a little more information about kind of picture you are trying to create? What data do you want on the x-axis? What data on the y-axis? What does your data represent? "plot the data" is pretty generic, so more information would help others answer your question.
From your question it looks like you are trying to use the plotSpread function from the MATLAB File Exchange, but you are missing one of the functions that is included along with that File Exchange entry (the file called repeatEntries.m). If that is the problem you are having, make sure you downloaded all the files in the File Exchange entry and have them available on your MATLAB path.
