Usr argument in par()


#1

i am doing a work in rstudio, and i dont know how to use the function usr, anybody can tell me how to use it (the sintaxis, the arguments, etc)


#2

I’ve never heard of the function usr, what package is it in?

To answer your question though, to find help with any function you can just run the command ?function in R and it will bring up it’s documentation.

For example, ?usr should answer your question.


#3

hey is a grafical function i guess (Because in tutorial they use it in this way: par(usr-c…)


#4

Okay, so usr is an argument of the par function (run the ?par command to find out more) which inputs a vector (x1, x2, y1, y2) and uses this vector to create the extremes of the plotting region. If I understand the documentation correctly (and I might not) if you used the vector (-10,10, -10, 10) it would give you the plot focused in on that region. Like this (not made in R because sometimes its easier to google for a picture):

image