What does the na_rep parameter mean?
I am looking at cat () method
http://pandas.pydata.org/pandas-docs/stable/generated/pandas.Series.str.cat.html#pandas.Series.str.cat
I can't figure out what na_rep is.
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Richard Rublev
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The docs Series.str.cat
says:
When na_rep is None (default behavior), NaN values in the run are ignored.
Series(['a','b',np.nan,'c']).str.cat(sep=' ')
'a b c'
Series(['a','b',np.nan,'c']).str.cat(sep=' ', na_rep='?')
'a b ? c'
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jezrael
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