Message-ID: <983e90aa-0975-41d0-9103-a48629c013ff@sapo.pt>
Date: 2024-07-18T16:43:19Z
From: Rui Barradas
Subject: ggplot two-factor legend
In-Reply-To: <004001dad926$f2612b90$d72382b0$@gmx.ch>
?s 16:27 de 18/07/2024, SIBYLLE ST?CKLI via R-help escreveu:
> Hi
>
> I am using ggplot to visualise y for a two-factorial group (Bio: 0 and 1) x
> = 6 years. I was able to adapt the colour of the lines (green and red) and
> the linetype (solid and dashed).
> Challenge: my code produces now two legends. One with the colors for the
> group and one with the linetype for the group. Does somebody have a hint how
> to adapt the code to produce one legend? Group 0 = red and dashed, Group 1 =
> green and solid?
>
>
> MS1<- MS %>% filter(QI_A!="NA") %>% droplevels()
> dev.new(width=4, height=2.75)
> par(mar = c(0,6,0,0))
> p1<-ggplot(data = MS1, aes(x= Jahr, y= QI_A,group=Bio,color=Bio,
> linetype=Bio)) +
> geom_smooth(aes(fill=Bio) , method = "lm" , formula = y ~ x +
> I(x^2),linewidth=1) +
> theme(panel.background = element_blank())+
> theme(axis.line = element_line(colour = "black"))+
> theme(axis.text=element_text(size=18))+
> theme(axis.title=element_text(size=20))+
> ylab("Anteil BFF an LN [%]") +xlab("Jahr")+
> scale_color_manual(values=c("red","dark green"), labels=c("?LN",
> "BIO"))+
> scale_fill_manual(values=c("red","dark green"), labels= c("?LN",
> "BIO"))+
> theme(legend.title = element_blank())+
> theme(legend.text=element_text(size=20))+
> scale_linetype_manual(values=c("dashed", "solid"))
> p1<-p1 + expand_limits(y=c(0, 30))
>
> kind regards
> Sibylle
>
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Hello,
To have one legend only, the labels must be the same. Try using
labels=c("?LN", "BIO")
in
scale_linetype_manual(values=c("dashed", "solid"), labels=c("?LN", "BIO"))
Hope this helps,
Rui Barradas
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