Adjusting spacing between two legends in ggplot2

[Deirdre Griffin]

Hey all,

I am trying the spacing between to adjust two legends in the graph attached (fill = Biochar dose (%) and linetype = pH adjustment) so that they are closer together and the title are justified at the top. I've played around with a few things but am not having any luck. Anyone have any suggestions? 

Below is my code, if that helps.

Thanks so much!

Deirdre

	ggplot(WS_all, aes(x = simpletrt, y = nodulenum_total))+ geom_boxplot(aes(fill = biochardose_pcnt, linetype = pH)) +
	facet_grid(.~soil, labeller = soils_labeller) +
	labs(y = "Nodule number per plant",
	x = "Treatment",
	fill = "Biochar dose (%)",
	linetype = "pH Adjusted") +
	scale_x_discrete(labels = c ("No amendment \ncontrol",
	"pH-adjusted \ncontrol",
	"WS biochar-\nlow dose",
	"WS biochar-\nhigh dose")) +
	theme_bw() +
	theme(legend.position = c(1,1),
	legend.box = "horizontal",
	legend.justification = c(1,1),
	legend.margin = unit(-0.4, "cm"),
	legend.key.size = unit(4.5, "mm"),
	axis.title.x = element_text(size = 11),
	axis.title.y = element_text(size =11, vjust = 1),
	axis.text.x = element_text(size = 9, angle = 45, hjust = 1),
	axis.text.y = element_text(size = 9),
	strip.text.x = element_text(size = 11),
	legend.title = element_text(size = 9),
	legend.text = element_text(size = 9),
	panel.grid.minor = element_blank(), panel.grid.major = element_blank())

[Matt Espe]

I believe you do it via guide_legend(label.vjust = ___).

http://docs.ggplot2.org/current/guide_legend.html

Not 100% sure though - if it is a one time deal, you can also re-position elements in a pdf with Acrobat Pro or Inkscape. 

Matt