How can you emphasize specific data in an R Line Graph?

You can emphasize specific data in an R line graph by using different colors, line types (e.g., dashed or dotted lines), and markers (e.g., circles, triangles) for the data points. These customizations help to distinguish different data series, highlight trends, or draw attention to particular points or periods within the graph.

# Customizing a line graph in R
time <- c(1, 2, 3, 4, 5)
series1 <- c(3, 6, 9, 12, 15)
series2 <- c(2, 4, 6, 8, 10)
plot(time, series1, type = "o", col = "blue", pch = 16, lty = 1, xlab = "Time", ylab = "Values", main = "Customized Line Graph")
lines(time, series2, type = "o", col = "red", pch = 17, lty = 2)

In this example, two data series are plotted on the same graph. The first series is displayed in blue with solid lines and circle markers, while the second series is shown in red with dashed lines and triangle markers. These visual distinctions make it easier to compare the two series and draw attention to specific trends or differences.