[R] creating column based on another variable

[Uwe Ligges]

Jeff Miller wrote:
> Hi all,
> 
>  
> 
> I hope someone can help me with this.
> 
>  
> 
> Suppose I import a text file and one of the columns looks like this:
> 
>  
> 
> New York
> 
> New York
> 
> England
> 
> Spain
> 
> Spain
> 
> Orlando
> 
> New York
> 
> England
> 
> France


I don't understand the semantics here. You are mixing cities and countries.


> I want to add a variable that is based on the previous one
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>  
> 
> US
> 
> US
> 
> Europe
> 
> Europe
> 
> Europe
> 
> US
> 
> US
> 
> Europe
> 
> Europe


Now you are mixing a single country and a whole continent.

Is this some homework?

You should consider to tell R which cities are in the US and which 
countries are in Europe and than try to match appropriately ...
As the footer of this message says:
"PLEASE do read the posting guide 
http://www.R-project.org/posting-guide.html"
which tells you to read introductory material and to specify some code 
examples and details that you already have got. Then it's much easier 
for us to help.

Uwe Ligges



>  
> 
> How do that?
> 
>  
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> Also, I would like to be able to export the data as a text file that retains
> this new variable.
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> 
> Any suggestions are greatly appreciated,
> 
>  
> 
> Jeff Miller
> 
>  
> 
> 
> 	[[alternative HTML version deleted]]
> 
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