about different y-axis

[lily li]

Hi ggplot users,

I don't know how to draw one variable reversed while the other one normal order on y-axis in ggplot?

df

month   A    B 

1           10  0.5

2           15  0.7

3           18  0.8

4           16  1

5           20  1.1

6           12  0.6

plot1= ggplot()+geom_path(data=df,aes(x=month,y=B))+

  scale_y_continuous(trans='reverse')

print(plot1)

But if I want to put only B reversed, and plot A on the same plot but in normal y-axis. how to do it? the code does not work

plot2 = ggplot()+geom_path(data=df,aes(x=month,y=B,color='b'))+

 geom_path(data=df,aes(x=month,y=A,color='a'))+scale_y_continuous(trans='reverse')+scale_color_manual(limits=c('b','a'),values=c('red','blue'))

print(plot2)

also, I want to apply the trans='reverse' only to B variable. Thanks for your help.

[Roman Luštrik]

Hi,

for color, you should probably use a non-character, preferably a value. If you don't have column 'b', you could specify color outside the aes() call.

Have you tried using `rev(B)`?

Cheers,

Roman 

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