Changing line types in density plot

[gafna jeff]

Hi everyone,

I would really appreciate your help on this.

How can I change the line types in this example density plot. For instance dashed, dotted lines etc. In this example, I am using the diamonds data available in R base. I tried adding this line but it does not change the line type:     scale_linetype_manual(values = c("dashed", "solid", "dashed", "solid"))

#Here is the example 

library(ggplot2)

data("diamonds")
View(diamonds)

ggplot(diamonds, aes(depth, colour = cut)) + scale_linetype_manual(values = c("dashed", "solid", "dashed", "solid")) +
  geom_density()

[Tom Fritzsche]

Hi Gafna Jeff,

In order to scale something manually you need to mention it in the aesthetics.
Assuming that you would like to vary line types by the factor 'cut'
the code below should work.
Since there are five factor levels, I added one more linetype
('dashed') in the manual command.

ggplot(diamonds, aes(depth, colour = cut, lty = cut)) +
scale_linetype_manual(values = c("dashed", "solid", "dashed", "solid",
"dashed")) +
geom_density()

Hope this helps,
Tom

---
Tom Fritzsche
University of Potsdam
Department of Linguistics
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14476 Potsdam
Germany

office: 14.140
phone: +49 331 977 2296
fax: +49 331 977 2095
email: tom.fr...@uni-potsdam.de
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[gafna jeff]

Dear Tom,

Thanks for your help. It works perfectly. Much appreciated

[Thierry Onkelinx]

You need to add an aesthetic for the linetype too.

ggplot(diamonds, aes(depth, colour = cut, linetype = cut))  + geom_density()

ir. Thierry Onkelinx

Statisticus / Statistician

Vlaamse Overheid / Government of Flanders
INSTITUUT VOOR NATUUR- EN BOSONDERZOEK / RESEARCH INSTITUTE FOR NATURE AND FOREST
Team Biometrie & Kwaliteitszorg / Team Biometrics & Quality Assurance
thierry....@inbo.be
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www.inbo.be

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Op ma 6 sep. 2021 om 13:25 schreef gafna jeff <gafn...@gmail.com>: