BTW: you probably also want to use requireNamespace(..., quietly=TRUE)
otherwise if sort of defeats the purpose ...
On Sep 17, 2014, at 10:46 PM, Simon Urbanek <simon.urba...@r-project.org> wrote:
>
> On Sep 17, 2014, at 10:00 PM, Dario Strbenac <dstr7...@uni.sydney.edu.au>
> wrote:
>
>> I have a simple function :
>>
>> f <- function()
>> {
>> if(requireNamespace("ggplot2"))
>> qplot(Sepal.Length, Petal.Length, data = iris, color = Species)
>> else
>> message("No graphics, just text.")
>> }
>>
>> ggplot2 is in the Suggests field of the DESCRIPTION file. When I load the
>> package, and run the function, I get an error :
>>
>>> f()
>> Loading required namespace: ggplot2
>> Error in f() : could not find function "qplot"
>>
>> I don't want all ggplot2 functions to be added to the search path, so I am
>> not using require(ggplot2). How can I use it correctly ?
>>
>
> ggplot2::qplot(Sepal.Length, Petal.Length, data = iris, color = Species)
>
> Cheers,
> S
>
>
>> R version 3.1.1 (2014-07-10)
>> Platform: x86_64-unknown-linux-gnu (64-bit)
>>
>> --------------------------------------
>> Dario Strbenac
>> PhD Student
>> University of Sydney
>> Camperdown NSW 2050
>> Australia
>> ______________________________________________
>> R-devel@r-project.org mailing list
>> https://stat.ethz.ch/mailman/listinfo/r-devel
>>
>
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