plotting in different shapes using pch= argument
If I am using R to plot. How can I assign a particular shape to data points belonging to one category (using the pch argument to plot()) based on a column in my data frame that has the categorical data? Will using as.factor() to group data and then using pch help ?
You mean something like this...?
plot(Sepal.Length ~ Petal.Length, xlab = "Petal Length (cm)", ylab = "Sepal Length (cm)", pch = c(16, 17, 18)[as.numeric(Species)], # different 'pch' types main = "Anderson Iris Dataset", col = c("red", "green","blue")[as.numeric(Species)], data = iris)