Às 10:35 de 12/03/2025, Luigi Marongiu escreveu:
I have a data frame with measurements in different conditions. I set
the conditions as a factor using a notation for ease of use. I now
want to plot the data and assign meaningful labels to the factors. I
am using ggplot2; for the x axis I would like to keep the factors but
in the legend I would like to use custom values.
I tried different combinations but none worked.
What is the correct way to assign
custom labels to legends in ggplot2?
Thank you
EXAMPLE:
```
df = data.frame(Target = 1:4,
Rate = c(0.02078663, 0.03685543, 0.02238002, 0.05033979),
SD = c(0.003043398, 0.001447410, 0.002998729, 0.002171813))
df$Target = factor(df$Target)
ggplot(df, aes(x=Target, y=Rate, colour=Target, group=Target)) +
geom_point(size=8) +
geom_errorbar(aes(ymin=Rate-SD, ymax=Rate+SD), width=.1) +
scale_colour_manual(values = COLS) +
xlab(expression(bold("Class"))) +
ylab(expression(bold("Value"))) +
theme_classic(base_size = 15)
```
NOTE: if using
```
...
theme_classic(base_size = 15, labels = c("Condition 1", "Condition 2",
"Condition 3", "Control"))
```
I get the error:
Error in theme_classic(base_size = 15, labels = c("Condition 1",
"Condition 2", :
unused argument (labels = c("Condition 1", "Condition 2", "Condition
3", "Control"))
______________________________________________
R-help@r-project.org mailing list -- To UNSUBSCRIBE and more, see
https://stat.ethz.ch/mailman/listinfo/r-help
PLEASE do read the posting guide https://www.R-project.org/posting-guide.html
and provide commented, minimal, self-contained, reproducible code.
Hello,
The colors COLS are missing from the question.
As for the labels, use
lbls <- c("Condition 1", "Condition 2", "Condition 3", "Control")
and then
scale_colour_manual(values = COLS, labels = lbls)
Hope this helps,
Rui Barradas
--
Este e-mail foi analisado pelo software antivírus AVG para verificar a presença
de vírus.
www.avg.com
______________________________________________
R-help@r-project.org mailing list -- To UNSUBSCRIBE and more, see
https://stat.ethz.ch/mailman/listinfo/r-help
PLEASE do read the posting guide https://www.R-project.org/posting-guide.html
and provide commented, minimal, self-contained, reproducible code.
