Hi,
I am struggling at the moment with two -probably basic- issues.
1. I am working on the Italian dataset which collected the results of the PIAAC questionnaire (a research of the OECD). The majority of the variables appear red in the browser because they are string. After transforming the variables from string to numeric through the command encode, I obtained blue data which are the value labels of the variables.
Can I work (=doing regressions and do further analyses) with blue data or does it have to be black? How can I transform blue data in black?
2. The blue data still has some values which are characters: V, N, U etc. See image below. These actually represent missing values and I would like to remove them. How can I do this?
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