Message-ID: <11aaa8dd7ea546e9998406437a494df5@SRVEXCHCM1302.precheza.cz>
Date: 2018-05-22T07:15:19Z
From: PIKAL Petr
Subject: legend order in ggplot2
In-Reply-To: <CABcx46BBr3WqBg7nYz3iRU001ZyVG=1wCPqs7EUGxZ1pBBo2PA@mail.gmail.com>
Hi
Your approach seems to me rather complicated. I would reshape data before plotting and maybe also change order of levels in resulting variable factor
library(reshape2)
dfm<-melt(df)
dfm$variable<-factor(dfm$variable, levels=levels(dfm$variable)[c(2,1,3,4)])
p2<-ggplot(dfm, aes(x=rep(1:2,4), y=value))
p2+geom_line(aes(linetype=variable))+
scale_linetype_manual(values=c("solid", "dashed", "dotted", "blank"),
labels=c("name_b","name_a","name_c", "other"))
Cheers
Petr
> -----Original Message-----
> From: R-help [mailto:r-help-bounces at r-project.org] On Behalf Of John
> Sent: Tuesday, May 22, 2018 5:17 AM
> To: r-help <r-help at r-project.org>
> Subject: [R] legend order in ggplot2
>
> Hi,
>
> I'd like to graph three lines on ggplot2 and I intend the lines to be "solid",
> "dashed", and "dotted". The legend names are "name_b", "name_a",
> "name_c". I'd like to legend to present in the order: the "name_b" at the top,
> and "name_c" at the bottom.
> As a consequence, the legend is indeed in the order: name_b at the top and
> name_c at the bottom. However, I'd like name_b to corresponds to "solid",
> while it corresponds to "dashed", etc, which I don't want. How could I make
> "solid" correspond to "name_b"? Thanks,
>
> #########
>
> library(ggplot2)
> df<-data.frame(x1=c(1,2), y1=c(3,4),z1=c(5,6),w1=c(7,8)) p1<-ggplot(df,
> aes(x=1:2, y=x1))+
> geom_line(aes(linetype="name_b"))+
> geom_line(aes(x=1:2, y=y1, linetype="name_a"), df)+
> geom_line(aes(x=1:2, y=z1, linetype="name_c"), df)+
> scale_linetype_manual(name="", values=c("solid","dashed", "dotted"),
> breaks=c("name_b","name_a","name_c"))
> ###########
>
> [[alternative HTML version deleted]]
>
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