R software plot function

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We can also draw a regression line to our scatterplot by using the abline and lm R functions:. In combination with the density function, the plot function can be used to create a probability density plot in R:.

Figure 3 shows that our variable x is following a normal distribution. The small peaks in the density are due to randomness during the data creation process.

If we replace the plot function with the lines function, we can add a second density to our previously created kernel density plot. Have a look at the following R code:. Figure 4 contains multiple normally distributed densities, i. The plot function provides many arguments for the modification of its parameters.

For instance, we can change the main title and the axis labels of our plot as follows:. We just launched W3Schools videos. Get certified by completing a course today! If you want to report an error, or if you want to make a suggestion, do not hesitate to send us an e-mail:. Functions Global Variables. Example Draw one point in the diagram, at position 1 and position 3 : plot 1, 3. Example Draw two points in the diagram, one at position 1, 3 and one in position 8, 10 : plot c 1, 8 , c 3,