Category "density-plot"

Density plot on Iris dataset with R

I want to plot a density plot of my dataset. This is my code: data <- iris plot(density(data$Sepal.Length), main="Density Plot", ylab="Frequency

Density plot based on time of the day

I've the following dataset: https://app.box.com/s/au58xaw60r1hyeek5cua6q20byumgvmj I want to create a density plot based on the time of the day. Here is what