[R] Change the legend order by order function

[PIKAL Petr]

Hi

Which is actually answer the OP already got.

> library(ggplot2)
> df<-data.frame(x1=c(1,2), y1=c(3,4),z1=c(5,6),w1=c(7,8))
> library(reshape2)
> dfm<-melt(df)
No id variables; using all as measure variables
> 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

Tento e-mail a jakékoliv k němu připojené dokumenty jsou důvěrné a podléhají tomuto právně závaznému prohlášení o vyloučení odpovědnosti: https://www.precheza.cz/01-dovetek/ | This email and any documents attached to it may be confidential and are subject to the legally binding disclaimer: https://www.precheza.cz/en/01-disclaimer/

> -----Original Message-----
> From: R-help [mailto:r-help-bounces using r-project.org] On Behalf Of Jeff
> Newmiller
> Sent: Wednesday, May 23, 2018 12:56 PM
> To: John <miaojpm using gmail.com>; r-help <r-help using r-project.org>; David
> Winsemius <dwinsemius using comcast.net>; Rui Barradas <ruipbarradas using sapo.pt>
> Subject: Re: [R] Change the legend order by order function
>
> There are two key concepts you seem to be unaware of regarding ggplot: 1)
> you really need to put your data in long format to work with multiple curves,
> and 2) the column containing the names of the curves should be a factor with
> levels in the order you wish them to be presented in the legend (bottom to
> top). I am not in a position at the moment to give you a full reprex, but Google
> can probably help you find lots of examples... try keywords factor long ggplot.
>
> Regarding using order to do this, the answer is likely "yes" but your existing
> example order seems easier to do with an explicit listing of labels in sequence...
> I cannot fathom why you think name_b, name_c, name_a is a natural result of
> using the order function that people will want to see. Either be explicit or use
> an alphabetic order, either way does not need the order function.
>
>
>
> On May 23, 2018 10:27:14 AM GMT+02:00, John <miaojpm using gmail.com>
> wrote:
> >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_c", "name_a". I'd like to legend to present in the order: the
> >"name_b" at the top, and "name_a" at the bottom.
> >
> >   Could it be done by order function or its inverse?
> >
> >Thanks,
> >
> >##### source code
> >
> >library(ggplot2)
> >
> >od<-order(c("name_b", "name_c", "name_a")) 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_c"), df)+
> >  geom_line(aes(x=1:2, y=z1, linetype="name_a"), df)+
> >scale_linetype_manual(name="", values=c("solid","dashed",
> >"dotted")[(od)],
> >labels=c("name_b","name_c","name_a"))
> >
> >
> >#### supplement
> >> od
> >[1] 3 1 2
> >> order(od)
> >[1] 2 3 1
>
> --
> Sent from my phone. Please excuse my brevity.
>
> ______________________________________________
> R-help using r-project.org mailing list -- To UNSUBSCRIBE and more, see
> https://stat.ethz.ch/mailman/listinfo/r-help
> PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
> and provide commented, minimal, self-contained, reproducible code.

________________________________
Tento e-mail a jakékoliv k němu připojené dokumenty jsou důvěrné a jsou určeny pouze jeho adresátům.
Jestliže jste obdržel(a) tento e-mail omylem, informujte laskavě neprodleně jeho odesílatele. Obsah tohoto emailu i s přílohami a jeho kopie vymažte ze svého systému.
Nejste-li zamýšleným adresátem tohoto emailu, nejste oprávněni tento email jakkoliv užívat, rozšiřovat, kopírovat či zveřejňovat.
Odesílatel e-mailu neodpovídá za eventuální škodu způsobenou modifikacemi či zpožděním přenosu e-mailu.

V případě, že je tento e-mail součástí obchodního jednání:
- vyhrazuje si odesílatel právo ukončit kdykoliv jednání o uzavření smlouvy, a to z jakéhokoliv důvodu i bez uvedení důvodu.
- a obsahuje-li nabídku, je adresát oprávněn nabídku bezodkladně přijmout; Odesílatel tohoto e-mailu (nabídky) vylučuje přijetí nabídky ze strany příjemce s dodatkem či odchylkou.
- trvá odesílatel na tom, že příslušná smlouva je uzavřena teprve výslovným dosažením shody na všech jejích náležitostech.
- odesílatel tohoto emailu informuje, že není oprávněn uzavírat za společnost žádné smlouvy s výjimkou případů, kdy k tomu byl písemně zmocněn nebo písemně pověřen a takové pověření nebo plná moc byly adresátovi tohoto emailu případně osobě, kterou adresát zastupuje, předloženy nebo jejich existence je adresátovi či osobě jím zastoupené známá.

This e-mail and any documents attached to it may be confidential and are intended only for its intended recipients.
If you received this e-mail by mistake, please immediately inform its sender. Delete the contents of this e-mail with all attachments and its copies from your system.
If you are not the intended recipient of this e-mail, you are not authorized to use, disseminate, copy or disclose this e-mail in any manner.
The sender of this e-mail shall not be liable for any possible damage caused by modifications of the e-mail or by delay with transfer of the email.

In case that this e-mail forms part of business dealings:
- the sender reserves the right to end negotiations about entering into a contract in any time, for any reason, and without stating any reasoning.
- if the e-mail contains an offer, the recipient is entitled to immediately accept such offer; The sender of this e-mail (offer) excludes any acceptance of the offer on the part of the recipient containing any amendment or variation.
- the sender insists on that the respective contract is concluded only upon an express mutual agreement on all its aspects.
- the sender of this e-mail informs that he/she is not authorized to enter into any contracts on behalf of the company except for cases in which he/she is expressly authorized to do so in writing, and such authorization or power of attorney is submitted to the recipient or the person represented by the recipient, or the existence of such authorization is known to the recipient of the person represented by the recipient.