R help - Aug 2013 - Legend formatting (ggplot2)

I am having trouble getting my legend to format the way I want it to.  I
suspect it is something simple.
>
> the code I have is
> library(ggplot2)
> ggplot(Chem.comp, aes(Course, GRADE.)) + geom_boxplot(notch >
TRUE,aes(fill = COHORT))+
>   labs(title = "Comparison between ISE cohorts and Peers in the Same
Chem
> 2 class",
>        y ="Grade Points in class",
>        x = "Chemistry 2 quarter") + ylim(0,4.3333)+guides(colour
> guide_legend(nrow = 3))+
>   scale_fill_manual(name = "ISE Cohorts &\nComparison
groups", values >
c("blue","red","blue3","red3","blue4","red4"))
>
> which plots as attached
>
> I would like to have the legend as two columns one blue (ISE07, ISE08,
> ISE09) and one red ( Comparison 07, Comparison 08, Comparison 09)
>
> the guids(colour = guide_legend(nrow=3)) is what I found at stack overflow
>
> (
>
http://stackoverflow.com/questions/12323416/arranging-ggplot2-legend-items-in-a-grid
> )
>  and I am not quite sure how to parse for myself the ggplot documentation
> page but it looks the same.
>
http://docs.ggplot2.org/current/guide_legend.html
>
> Ideally I'd like the legend to have a column of text lables,(ISE...) a
> column of blue boxes, a column of red boxes and a column of text labels
> (Comp....). but that is mostly just bonus.
>
> Thanks
> Robert
>
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Hi Robert,

Your legend is for fill, not color, so you need

guides(fill = guide_legend(nrow = 3))

instead of

guides(colour = guide_legend(nrow = 3))

Best,
Ista

On Wed, Aug 28, 2013 at 5:09 PM, Robert Lynch <robert.b.lynch at
gmail.com> wrote:
> I am having trouble getting my legend to format the way I want it to.  I
> suspect it is something simple.
>
>>
>> the code I have is
>> library(ggplot2)
>> ggplot(Chem.comp, aes(Course, GRADE.)) + geom_boxplot(notch >>
TRUE,aes(fill = COHORT))+
>>   labs(title = "Comparison between ISE cohorts and Peers in the
Same Chem
>> 2 class",
>>        y ="Grade Points in class",
>>        x = "Chemistry 2 quarter") +
ylim(0,4.3333)+guides(colour >> guide_legend(nrow = 3))+
>>   scale_fill_manual(name = "ISE Cohorts &\nComparison
groups", values >>
c("blue","red","blue3","red3","blue4","red4"))
>>
>> which plots as attached
>>
>> I would like to have the legend as two columns one blue (ISE07, ISE08,
>> ISE09) and one red ( Comparison 07, Comparison 08, Comparison 09)
>>
>> the guids(colour = guide_legend(nrow=3)) is what I found at stack
overflow
>>
>
>
>> (
>>
http://stackoverflow.com/questions/12323416/arranging-ggplot2-legend-items-in-a-grid
>> )
>>  and I am not quite sure how to parse for myself the ggplot
documentation
>> page but it looks the same.
>>
> http://docs.ggplot2.org/current/guide_legend.html
>
>>
>> Ideally I'd like the legend to have a column of text
lables,(ISE...) a
>> column of blue boxes, a column of red boxes and a column of text labels
>> (Comp....). but that is mostly just bonus.
>>
>> Thanks
>> Robert
>>
>
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