Dear all,

I searched the mail archives and the R site and found no guidance (tried "merge", "cbind" and terms like "coalesce" with no success). There surely is a way to coalesce (like in SQL) columns in a dataframe, right? For example, I would like to go from a dataframe with two columns to one with only one as follows:

From

Name.x Name.y
nx1 ny1
nx2 NA
NA ny3
NA NA
...

To

Name
nx1
nx2
ny3
NA
...

where column Name.x is taken if there is a value, and if not then column Name.y

Any help would be appreciated

Kind regards,
Ivan

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