DataFrame with all field as text data

I am working with a data frame where all the fields are character type. When I try to coerce some fields ( "20-25 years"......and so on), I get NAs in all the rows of that column.

Please guide me as to how I can convert text data to appropriate types.


To help us help you, could you please prepare a reproducible example (reprex) illustrating your issue? Please have a look at this guide, to see how to create one:

I am sorry. I am new. I tried to create a "reprex". But failed.
Can you please direct me to some place where I can learn first to "reprex"


Click on the link I gave you, that is a guide for beginners.

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