Extracting result from multiple kpss test get NA or NaN values

Hi everyone,

I encounter a problem when extracting p-value result from multiple kpss test. I do not know why sometimes it gets NA or NaN. However, when I try the test one by one, it does not have such values.

Please anyone help to figure it out.

Here are my code:

all_kpss1 = as.data.frame(sapply(MAC1, function(X) kpss.test(ts(X))$p.value))

Thank you!

Hi, welcome!

We don't really have enough info to help you out. Could you ask this with a minimal REPRoducible EXample (reprex)? A reprex makes it much easier for others to understand your issue and figure out how to help.

If you've never heard of a reprex before, you might want to start by reading this FAQ:

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