I am making its graph,
but the lines seen a little distorcionateds.
The same graph was maked in Stata and the lines are perfects. But I need change my work to R studio.
I want make a graph with this calidad of lines, all lines is beautiful. For example, the lines of the graphs of this link all are smooth.
https://rpubs.com/dsulmont/37913
Do I have a problem on my r-studio or graphics card?