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How to create a plot with dashed regression line in base R?
To create a regression line in base R, we use abline function after creating the scatterplot but if we want to have the line dash format then lty argument must also be used with value equals to 2 after defining the regression model inside abline. For example, if we have two columns x and y stored in a data frame called df then the plot with dashed regression line can be created by using −
plot(y~x,data=df) abline(lm(df$y~df$x),lty=2)
Example
Consider the below data frame −
> x<-rnorm(20,5,0.27) > y<-rnorm(20,5,0.04) > df<-data.frame(x,y) > df
Output
x y 1 5.243553 4.969598 2 4.681088 5.076128 3 4.681055 5.041027 4 5.258455 4.989137 5 5.131443 4.987677 6 4.758463 5.018593 7 5.112578 5.022733 8 4.920249 4.989048 9 4.859121 5.036731 10 5.706240 5.024192 11 5.245567 4.950013 12 5.437835 5.000518 13 4.870448 5.020207 14 4.815908 5.035733 15 4.732599 5.012715 16 4.994069 4.986095 17 4.908797 5.004708 18 4.918521 5.003732 19 5.002987 5.005675 20 4.941110 4.998503
Creating the scatterplot between x and y −
Example
plot(y~x,data=df)
Output
Adding the dashed regression line to the above plot −
Example
abline(lm(df$y~df$x),lty=2)
Output
Updated on: 08-Dec-2020
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