Background We generate a precipitation graphic that is based on the mean of an ensemble of models. Because it goes out 16 days, we can have a wide variety of amounts...sometimes it can be as little as 2 inches other times it can be as great as 6 or 7. This variability can cause some issues with users when our color scale always changes relative to the amounts. For example Day 1, 1 inch is yellow and 3 inches is purple....Day 2, 2 inches is yellow and 6 inches is purple.
Is there a way to categorize amounts, say 0-1, 1-2, 2-3, 4-5, 5-6, 7+ so that purple will always represent 7+ and yellow will always be 0-1, etc...I've looked at the r.colors wiki page but I can't seem to get the rules to work correctly. I need a consistent color scheme for the graphic that communicates the level of concern properly to the user. Any examples would be greatly appreciated...Thanks. -- Nathan Barber Hydrologist NOAA National Weather Service Ohio River Forecast Center <http://www.erh.noaa.gov/ohrfc/> 1901 S State Rt 134 Wilmington, OH 45177 (937) 383-0528
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