Mean of all years

[Mohima17]

If I want to get mean of 30years what will be the code with xarray? Dimension would look like (lat, lon, time=1). If I use 'time.year' I get yearly mean and the time dimension is time=30, but I need mean of all year (time=1). Please suggest me how can I get the mean with xarray.

[brian-rose]

Hi @Mohima17, we probably need more context (such as some actual example code) to answer your questions properly, but the typical way to take a time mean on an Xarray data array would just look like this:

myarray.mean(dim="time")

[Mohima17]

How can I get dimension year=1, mean of whole 29 years

[Mohima17]

Thank you for your reply.

[Mohima17]

My code is: df.sla.groupby('time.year').mean() / df.groupby('time.year').mean()

[brian-rose]

In that screenshot, the time coordinate is called year, not time. So to average over that dimension you would do

[variable name].mean(dim="year")

Many xarray operators, including mean, accept named dimensions as arguments. But the name must correspond to a dimension that exists in the data array.