search for: example_cumulative_rainfall

...What it does it perfectly calculates the cumulative sum of the rainfall and resets the sum at the beginning of each year but I cannot plot the cumulative sum of rainfall in a way that each year is represented by a separate line in one graph such as in this example: http://dl.dropbox.com/u/4236038/example_cumulative_rainfall.png Any help would be highly appreciated. Thanks, Martin