I have one field ,which is string ,and can input numeric ,NA and ND and UNK ,now I want to keep the values which is not numeric and ND. how can I get the result?

[Trifacta_Alumni]

Hi @wu cong?,

One idea is to add a FILTER step with a custom formula that MATCHES a pattern.

Cheers,

Nathanael

[WuCong]

could you give the detail?