I am trying to make a function that exports data given in matlab to a spreadsheet in excel and then plots the data in excel.   

I am able to export the data into the spreadsheet fine, but I can only plot the data if I have graphed previous data in the file, and it limits me to the amount I plotted previously.  

For example: I set up a dummy spreadsheet in excel with two different dependent variables and 10 data points each.  If I export any data within that range it is fine but if I for example try to plot 3 different dependent variables and 100 data points only the first 10 data points of the first two dependent variables will show up.

Thanks
Bryan