Question

Does anyone know the code to use in R programming to create a scatter plot?

Answer 1

The basic syntax for creating scatterplot in R is −

plot(x, y, main, xlab, ylab, xlim, ylim, axes)

Following is the description of the parameters used −

• x is the data set whose values are the horizontal coordinates.

• y is the data set whose values are the vertical coordinates.

• main is the tile of the graph.

• xlab is the label in the horizontal axis.

• ylab is the label in the vertical axis.

• xlim is the limits of the values of x used for plotting.

• ylim is the limits of the values of y used for plotting.

• axes indicates whether both axes should be drawn on the plot.

EXAMPLE

We use the data set "mtcars" available in the R environment to create a basic scatterplot. Let's use the columns "wt" and "mpg" in mtcars. The below script will create a scatterplot graph for the relation between wt(weight) and mpg(miles per gallon).

# Get the input values.
input <- mtcars[,c('wt','mpg')]

# Give the chart file a name.
png(file = "scatterplot.png")

# Plot the chart for cars with weight between 2.5 to 5 and mileage between 15 and 30.
plot(x = input$wt,y = input$mpg,
   xlab = "Weight",
   ylab = "Milage",
   xlim = c(2.5,5),
   ylim = c(15,30),              
   main = "Weight vs Milage"
)