Plotting the Regression
Learn how to plot the results of the regression.
We'll cover the following
The abline()
function
The abline()
function plots a straight line on an existing scatterplot. It requires two arguments: an intercept (a
) and a slope (b
). Thus, in R’s terminology, the equation for a straight line is y = a + bx
. We can also pass other optional plotting parameters if we want to change the line width, style, color, and so on. Let’s draw a simple regression plot in base graphics as follows:
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