Subscript in ggplot2

Question

I am trying to get a combination of colours I want and legend labels I want with ggplot2 graph.

Essentially the code below achieves most things apart from I can't get the legend label to display what I want, ideally I would like it to be 'treatment 1' with '1' as subscript but I can't put an expression like this expression('treatment'[+1]) as it doesn't seem to accept it in the labels argument. Can someone help please it's driving me crazy!

I think it should be possible to insert it somewhere else in the syntax but I am unsure as to where.

graph1<-ggplot(data2, aes(SMR_residuals,y=log(Time), color = factor(Treatment, labels = c("1", "2", "3","4")))) + geom_point() + labs(color = "Treatment") + geom_smooth(method="lm", se=F) + scale_colour_brewer(palette = "Set1")

Does this post help: stackoverflow.com/questions/17334759/… Or this: stackoverflow.com/questions/6202667/… — Ryan Morton
– Ryan Morton, Commented Jan 24, 2017 at 20:43
You may find this answer useful, as it shows how to use expressions in the labels argument of `scale_color_manual'. — aosmith
– aosmith, Commented Jan 24, 2017 at 23:38

Dasr · Accepted Answer · 2017-01-25 10:19:08Z

2

So I think with some help I managed to work it out, I ended up using scale_colour_brewer and writing the expression for the labels in there, this seems to have done the trick:

graph1<- ggplot(data2,aes(SMR_residuals,y=log(Time),color=Treatment)) +
geom_point()+ labs(color="Treatment") + geom_smooth(method="lm", se=F) +
theme(legend.text.align = 0) + scale_colour_brewer(palette="Set1", breaks =
c("IND","IND2","IND4","IND6"),
labels=c("Treatment",expression("Treatment"[+2]),expression("Treatment"[+4]),
expression("Treatment"[+6])))

edited Jan 25, 2017 at 10:19

answered Jan 25, 2017 at 10:07

Dasr

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