ggplot2 geom_point change color by values of a column

Asked Oct 10 '17 at 13:43

Active Oct 10 '17 at 13:45

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I'm using ggplot2 in order to make a line plot (y=sum of income, x=date)with points representing sales (y=intersection of line plot, x=promotiondate).

I have another column that represents the type of promotion and I want to change the color of points by the different values of this column.

p1<- ggplot(df,aes(x= date,y = income))

p1 + geom_line(col="red") + 
  geom_point(aes(x=df$promotiondate, y=df$income))+
  scale_color_manual(name="promotioncode", values = c("0"="white","P_1##1##1"="red","P_120##1##1"="blue","P_21##1##1"="green", "P_30##1##1"="yellow", "P_50##1##1"="purple", "P_66##1##1"="black"), labels=c("0","P_1##1##1","P_120##1##1","P_21##1##1", "P_30##1##1", "P_50##1##1", "P_66##1##1"))

This is what I obtain

As you can see all the points are black.

How can I make the colour of the points change based on the values of the columns promotioncode?

Thanks in advance

edited Oct 10 '17 at 13:45

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asked Oct 10 '17 at 13:43

Filippo Leoncini

1

Could you please make your question into a [reproducible example](https://stackoverflow.com/questions/5963269/how-to-make-a-great-r-reproducible-example#5963610)? You can dput(df) and post the return – csgroen Oct 10 '17 at 13:46
2

Try `geom_point(aes(x=df$promotiondate, y=df$income, color=df$promotioncode))` – Marco Sandri Oct 10 '17 at 13:46
Grazie Marco ;) – Filippo Leoncini Oct 10 '17 at 13:50
7

don't use `$` in `aes()` – Roman Oct 10 '17 at 13:58

ggplot2 geom_point change color by values of a column

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