[R] How to decrease size of points?

[Rui Barradas]

Hello,

Your example is not reproducible but here it goes.

Data:

df1 <- iris[c(1, 2, 5)]

Use scale_size_manual.

1. If Stage is a factor or character



df1$Stage <- "a"

p <- ggplot(df1, aes(Sepal.Length, Sepal.Width, color = Species))
p1 <- p +
   geom_point(aes(size = Stage), alpha = 1/3) +
   xlab ("X") +
   ylab("Y") +
   geom_smooth(method = 'loess', formula = y ~ x)



2. If Stage is numeric, coerce to factor manually


df1$Stage <- 5

p <- ggplot(df1, aes(Sepal.Length, Sepal.Width, color = Species))
p1 <- p +
   geom_point(aes(size = factor(Stage)), alpha = 1/3) +
   xlab ("X") +
   ylab("Y") +
   geom_smooth(method = 'loess', formula = y ~ x)


Then add the scale_size


p1 + scale_size_manual(values = 0.8)


Hope this helps,

Rui Barradas

Às 16:05 de 30/09/20, Medic escreveu:
> The code works as I want, but the points are too big. How to decrease
> them? (Where to insert: size = 0.8?)
> p1 <- p + geom_point(aes(size = Stage), alpha = 1/3) + xlab ("X") +
> ylab("Y") + geom_smooth()
> 
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