[ncl-talk] Cross validation

[sweet fulas]

Hello all

Is there anyone who can help me how to calculate cross-validation in NCL.am
student and also bigger of NCl I got difficulty.
I build a statistical model for seasonal forecasting but I cannot
understand how to calculate the cross-validation(to check how good is my
model), RMSE(root mean-square-error.*Is it possible in NCL*
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