Connect the red points with a line in ggplot - r

Question

Please help me;
I made a plot comprising some red and blue points using ggplot.
Now I want to connect the red points to each other with a line and connect the blue points to each other with another line
These are my codes
m <- as.factor(c(7,"12 PCA", 21, "24 PCA", "31 PCA", 38, 70))
## Then we plot the points
ggplot(pH, aes(x= m, y=All))+ ylim(60,100)+
scale_x_discrete(limits=c(7,"12 PCA", 21, "24 PCA", "31 PCA", 38, 70))+
geom_point(data=pH, aes(y=All), colour = 'red', size =1)+
geom_point(data=pH, aes(y=Test), colour = 'blue', size=1)
And this is my plot
How can I do that?
Thanks

Answer 1

I think it's generally best to not work with independent vectors of data when possible, instead placing it in a single frame. In this case, one column will be used to indicate which "group" the dots belong to.
dat <- data.frame(m=c(m,m), All=c(94,95,96,95,94,95,96, 74,67,74,67,68,73,74), grp=c(rep("red",7), rep("blue",7)))
dat
# m All grp
# 1 7 94 red
# 2 12 PCA 95 red
# 3 21 96 red
# 4 24 PCA 95 red
# 5 31 PCA 94 red
# 6 38 95 red
# 7 70 96 red
# 8 7 74 blue
# 9 12 PCA 67 blue
# 10 21 74 blue
# 11 24 PCA 67 blue
# 12 31 PCA 68 blue
# 13 38 73 blue
# 14 70 74 blue
Plot code:
library(ggplot2)
ggplot(dat, aes(m, All, group=grp, color=grp)) +
geom_point() +
geom_line() +
scale_color_manual(values = c(blue = "blue", red = "red"))