Page 262 - Data Science class 11
P. 262

t <- c(24,27.0,80.0,249.2,236.2,86.8)
             # Give the chart file a name.
             png(file = "line_chart_5_lines.jpg")
             # Plot the bar chart.
               plot(v,type = "o",col = "red", xlab = "Month starting from Apr", ylab = "Rainfall
             in mm",
                  main = "Rainfall Delhi /Ahmedabad")
             lines(t, type = "o", col = "blue")
             # Save the file.
             dev.off()




















        When you execute the above code, it produces the following result:































        7.6.3 drawing a line chart using the ggplot2
        Now let us see how we can draw a line chart using the ggplot2 plotting package.

        Here we are plotting a particular country’s world cup win and then connecting them via line chart.
        set.seed()—this function is used to generate random values.
        Example
        Enter the following code snippet into the script panel:

             library(ggplot2)
          260   Touchpad Data Science-XI
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