xroms: migrating metrics to derived variables

[tlsw231]

1. I have a dataset from an ocean model (ROMS).
2. I use resample to compute daily-averaged values of some variable.
3. I am trying to use xroms.ddxi to get the x-derivative of the daily-averaged variable with the code below (The variable utemp_daily is the daily-averaged variable and utemp is the original variable.):

xroms.ddxi(utemp_daily,utemp_daily.attrs['grid'])

5. I get the error message: Unable to find any combinations of metrics for array dims {'xi_u', 'eta_rho', 's_w'} and axes ('Z',)"

I confirmed the daily-averaged variable does have a grid attribute.

Is there a way to seamless pass along the metrics to derived variables?

Here is the output of cf.describe():

.

[dcherian]

Hi @tlsw231 can you please move this question to either xgcm or xroms instead

[tlsw231]

Sure, thanks!