I am having a problem where geom_smooth() is not working on my ggplot2. But instead of a smooth curve, there is a fold. My X-axis variable is the factor variable(I've tried to convert it to a numerical variable, but it didn't work), and Y-axis is numeric variable. My data.frame is that
ggplot(tmp, aes(x = x, y = y))+
geom_point()+
geom_smooth(formula = y ~ x, method = "loess", stat = "identity", se = T, group = "")
I hope to get a pic like this.
A quick fix will be to wrap the group inside aes
. Generated a data similar to the structure you have (a factor x variable and a numeric y var).
set.seed(777)
x <- rep(c(LETTERS[1:7]), 3)
y <- rnorm(21, mean = 0, sd = 1)
tmp <- data.frame(x,y)
# -------------------------------------------------------------------------
base <- ggplot(tmp, aes(x = x, y = y))+geom_point()
base + geom_smooth(formula = y ~ x, method = "loess",se = TRUE, aes(group = "" ), level = 0.95) + theme_bw()
If you want to use a different level of confidence interval, you can change the value of level (which is a 95% by default).
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