ggplot geombar aesthetics issues

Question

trying to plot a stacked bar plot in ggplot. Having a hard time changing the position of the legend and the color scheme used by the default settings.

I have some data that's been melted into 5 columns called R1, R2, R3, variable, value

stackedCE <- ggplot() + 
geom_bar(data= all_melted, stat = "identity", color = "black", aes(x= R2, 
y= value, fill=variable, width =0.5)) +
ylab("ratio") + 
scale_y_continuous(limits=c(0,100)) +
scale_color_manual(labels=c("Phase 1", "Phase 2"), 
values = c("grey34",  "grey88")) +
xlab("Time (Days)") + 
theme(legend.title = element_blank(), legend.position ="top") +
theme_bw() +
facet_grid(R1 ~ R3, scales="free")

The plot generated works but the colors don't change for the default and the legend title and labels remain the same. Any quick hints would be much appreciated.

note that scale_color_manual is for colours, but you have fill=variable as your aesthetic mapping. — Brian
Yes, I figured out that this was my mistake. Changing scale_color_manual to scale_fill_manual fixed everything. — user7871651

Mark Peterson Mark Peterson · Accepted Answer · 2017-06-29T12:01:48

theme_bw() is resetting all of the theme elements to its defaults after you have manually changed them. Flip the order (put your custom theme() after theme_bw()) and it should work.

ggplot geombar aesthetics issues

1 Answers