As with most of graphical functions, it accepts basic arguments to suit your outcome to your mood! You can for example change the character expansion of the text, its color, or the font with arguments “cex”, “col” and “font” respectively. There might be something else to it, but if yes, I don’t know what.Īdding text to a graph: the “text()” functionįeeling bold? You want to add information to your graph? R got what you want! You just need to bring 2 information with you: the text you want to add, and where you want to add it! Easy, right? Once that gathered, the “ text()” function will do the rest of the work for you. Well, as far as I know, they are just to make things easy when you want to do one or the other, without having to worry about setting a type in a counter-intuitive way. “Wait a minute Flo! The points() function can make lines, and the lines() function can make points? Isn’t it weird? Isn’t it redundant? Bottom line, what’s the point?” lines(x,y+5,col="red",lwd=3)Īnd on a side note, this can be used to simply add other data points, when we set type=”p” lines(x,y+10,type="p",col="blue")
plot(x,y,type="l") # Reminder: type="n" means "none", and doesn't display the points, exactly same syntax as with "plot()".
Its syntax is exactly like the one used for “ plot()“. The “lines()” function allows you to add, guess what! Lines! In all other cases, you specify the intercept and the slope with the arguments “a” and “b” respectively. For a horizontal line, you enter the y-value through the argument “h”. The function “abline()” will be useful when you need to add a straight line to a graph.įor a vertical line, you enter the x-value through the argument “v”. Its syntax is exactly like the one used for “ plot()“ plot(father~student,col="blue") points(mother~student,pch="+",col="red")Īnd on a side note, this can be used to trace a line that links your data points, when we set type=”l” plot(x,y,type="n") # Reminder: type="n" means "none", and doesn't display the points, exactly same syntax as with "plot()".
The “points()” function allows you to add, guess what! Points! And of course, graphical parameters already presented can be incorporated in those functions. Three functions are commonly used to perform those tasks. Once a graph is plotted, it is often useful to add new elements such as another set of data points (for another sample for example), or lines.
The only thing she left behind, laying in a puddle thicker than the cheap whisky I kept hidden in the top drawer of my desk, was a note scribbled on a match box…
#Add letter on graph r series#
What was she doing? The last time I met her was during the investigation of a series of poorly executed Excel graphs… Then, she confessed: As the slow glow of a cigarette being lighted up was illuminating her face, she said: “We meet again.” I was surprised to see her, here, at that time, in LA of all places.
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