Make a dataframe containing the same data. See the package GitHub - JuliaData/DataFrames.jl: In-memory tabular data in Julia
It’s hard to give any better answer than that to such a low effort question. For advice on how to get better quality help through asking better targeted questions, I’d strongly advise reading this thread: Please read: make it easier to help you
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julia> isnan.(df)
No, the equivalent of na in this context is missing. But I agree, OP needs to provide a minimum working example.
In the other thread he talks about NaN.
the other minimal answer than could be:
ismissing.(df)
thank you sir