Skip to content

Change ggplot legend

5 messages · Luis Fernando García, Roman Luštrik, Stijn Van Hoey

Original
Luis Fernando García
# 
Dear R experts,

I am trying to make a new plot. I have already finished and I just want to
change the color for the axis number and the legends, I have tried to make
the last function by removing the legend and adding a new one but it did
not work.

If any of you knows how to correct this, I would really appreciate it. My
aim is to rename the series as "Sp1" and "Sp2".

Thanks in advance!

HEre is the plot code

p <- ggplot(t,aes(x=Ratio,y=Time)) + geom_point(aes(shape=factor(Sp)))

p + geom_smooth(aes(linetype=factor(Sp), ),colour="black", method='lm',
se=F)+theme(panel.grid.major = element_blank(), panel.grid.minor =
element_blank(),panel.background = element_blank(), axis.line =
element_line(colour = "black"))+

theme(legend.position="none")+#Remove legend to add a new one

scale_shape_discrete(name  ="Species",labels=c("Sp1", "Sp2"))
Roman Luštrik
# 
Can you provide a reproducible example (using some available dataset or
simulate some data) and perhaps mark on the picture what you want to have
changed?

Cheers,
Roman


On Thu, Apr 16, 2015 at 11:11 AM, Luis Fernando Garc?a <luysgarcia at gmail.com

  
    

      
      
    

  


  


      

    

    

      
      

        


  

        

      Luis Fernando García
    

    

      
      #
    

  


  

      
Sure!

I can provide a sample graph

I want to get the axis values to be black and remove the legend with the
name "factor(Sp)" and get the values for the axis to be black!

Thanks!


This is the code

t<-read.table ("covartimesfinal2.txt", header=T)
attach(t)
p <- ggplot(t,aes(x=Ratio,y=Time)) + geom_point(aes(shape=factor(Sp)))
p + geom_smooth(aes(linetype=factor(Sp), ),colour="black", method='lm',
se=F)+theme(panel.grid.major = element_blank(), panel.grid.minor =
element_blank(),panel.background = element_blank(), axis.line =
element_line(colour = "black"))+
scale_shape_discrete(name  ="Species",labels=c("Sp1", "Sp2"))

2015-04-16 6:26 GMT-03:00 Roman Lu?trik <roman.lustrik at gmail.com>:

            

      
      
      
    

        

      
      
    

            

      
      
      
    

        
-------------- next part --------------
Sp	Time	Ratio
H	17	0.85
H	13	0.84
H	7	1.18
H	9	0.90
H	22	2.10
H	12	1.18
H	9	1.10
H	10	0.81
H	11	0.95
H	18	1.75
H	11	1.18
H	24	1.14
H	16	1.27
N	7	2.23
N	9	3.25
N	8	2.92
N	10	4.19
N	10	1.86
N	9	2.03
N	6	1.59
N	4	1.58
N	7	2.44
N	8	1.46
N	8	2.21
N	8	1.48
N	15	1.5
N	15	2.1
N	8	1.58
N	10	2.03
N	12	1.92
N	7	1.49
N	12	2.1
N	7	2.45
N	7	1.74
N	6	1.81
N	9	1.7
N	11	1.47
N	10	1.85
N	6	2.29

  
  


  


      

    

    

      
      

        


  

        

      Roman Luštrik
    

    

      
      #
    

  


  

      
To change the axis text color, use theme().

Compare

library(ggplot2)
ggplot(PlantGrowth, aes(x=group, y=weight)) +
  geom_boxplot()

to

ggplot(PlantGrowth, aes(x=group, y=weight)) +
  geom_boxplot() +
  theme(axis.text = element_text(color = "black"))

To change legend title, see
http://www.cookbook-r.com/Graphs/Legends_(ggplot2)/#modifying-the-text-of-legend-titles-and-labels

Cheers,
Roman



On Thu, Apr 16, 2015 at 11:36 AM, Luis Fernando Garc?a <luysgarcia at gmail.com

            

      
      
      
    

        

      
      
    

            

      
      
      
    

        

  
    

      
      
    

  


  


      

    

    

      
      

        


  

        

      Stijn Van Hoey
    

    

      
      #
    

  


  

      
Why don't you just adapt it in the dataframe and make sure the levels in 
the Sp column are renamed to "Sp1" and "Sp2"?
http://www.cookbook-r.com/Manipulating_data/Renaming_levels_of_a_factor/

grs,
Stijn

        
On 04/16/2015 11:26 AM, Roman Lu?trik wrote: