Using Conditional Statements to Change the Color of Data Points

Question

I have a data set, which I have used to make a scatter plot and I would like to assign three different colors to the data points within three different regions, based on the

Answer 1

You can define a vector of colors and pass it to the col argument of plot. Something like this :

colors <- rep("black", length(x))
colors[x<3] <- "red"
colors[x>1549] <- "pink"

plot(x, y, xlab="chr X position (Mb)",
           ylab="Diversity",
           pch=16, cex =0.7, 
           col = colors)