[Tutor] Python Help

[Adam Grierson]

Hi

 

I'm using 3D climate data (ending in “.nc”). The cube contains time, longitude and latitude. I would like to look at the average output over the last 20 years. The time field spans back hundreds of years and I only know how to collapse the entire field into a mean value. How can I tell python to collapse just the last 20 years into a mean value? 

 

Thank you

Adam
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