R help - Dec 2010 - Is there a join() function in R ? OR: simulating "Combining ggplot2 and Google Maps" by David Kahle

Hi everybody

Im on R version 2.11.1  on Mac OS X

I am working through David Kahle's example of using ggplot2 with Rgooglemaps
(found here:
https://github.com/hadley/ggplot2/wiki/Crime-in-Downtown-Houston,-Texas-:-Combining-ggplot2-and-Google-Maps).
Excellent page by the way. I have downloaded the data and the code and want
to learn how to do this by first simulating David's results and then working
it through line by line to make sure I understand what every line of code
does and then applying it to my own data. When I run the code however, it
breaks on the following line:

df <- suppressMessages(join(df_xyll, m_map, type = 'right'))

I do not seem to have the join() function. This looks almost SQLish. I have
tried ??join and looking on CRAN and a google search but I cannot find this
function. Is there a special library that one has to install for this to
work? Can anyone help please.

Best regards
Christiaan

	[[alternative HTML version deleted]]

Hi Christiaan,

That looks like the join function in the plyr package.

Michael

On 16 December 2010 22:06, christiaan pauw <cjpauw at gmail.com>
wrote:
> Hi everybody
>
> Im on R version 2.11.1 ?on Mac OS X
>
> I am working through David Kahle's example of using ggplot2 with
Rgooglemaps
> (found here:
>
https://github.com/hadley/ggplot2/wiki/Crime-in-Downtown-Houston,-Texas-:-Combining-ggplot2-and-Google-Maps).
> Excellent page by the way. I have downloaded the data and the code and want
> to learn how to do this by first simulating David's results and then
working
> it through line by line to make sure I understand what every line of code
> does and then applying it to my own data. When I run the code however, it
> breaks on the following line:
>
> df <- suppressMessages(join(df_xyll, m_map, type = 'right'))
>
> I do not seem to have the join() function. This looks almost SQLish. I have
> tried ??join and looking on CRAN and a google search but I cannot find this
> function. Is there a special library that one has to install for this to
> work? Can anyone help please.
>
> Best regards
> Christiaan
>
> ? ? ? ?[[alternative HTML version deleted]]
>
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