[R] merging data frame with world map

[Boris Steipe]

And more!
:-)
On Mar 7, 2016, at 8:15 AM, Michael Dewey <lists at dewey.myzen.co.uk> wrote:

> Inline
> 
> On 07/03/2016 12:21, hoda rahmati via R-help wrote:
>> Hi all,I have a data frame which have a column named COUNTRY, I want to merge my data frame with world map from ggmap to plot it on world map, but when I merge my data frame with world map I get 0 observations! Here is my main data frame (mydata):
>>     'data.frame':   269265 obs. of  470 variables:
>>      $ Serial       : num  41568 41568 41568 41568 41568 ...
>>      $ Duration     : num  218 351 250 200 375 91 236 250 236 322 ...
>>      $ COUNTRY      : Factor w/ 27 levels "","AU","BA","BE",..: 8 8 8 8 8
> 
> COUNTRY
> 
>> and here is the command for merging with world map:
>>      word_map=merge(world_map,mydata,by.x="region",by.y="country")
word_map

> 
> country
> 
>>      str(world_map)
world_map

>>      'data.frame':   0 obs. of  475 variables:
>>      $ Serial       : num
>>      $ Duration     : num
>>      $ COUNTRY      : chr
>> how should I correct this world_map structure to have all my observations? And I could not use rworldmap in R 3.2.3,anyone used this library in version 3.2.3?
>> Thanks for any help.
>> 
>> 
>> 	[[alternative HTML version deleted]]
>> 
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>> and provide commented, minimal, self-contained, reproducible code.
>> 
> 
> -- 
> Michael
> http://www.dewey.myzen.co.uk/home.html
> 
> ______________________________________________
> R-help at r-project.org mailing list -- To UNSUBSCRIBE and more, see
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> PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
> and provide commented, minimal, self-contained, reproducible code.