For example x and y are variables with 9986 numerical values.
To do a scatterplot type:
What you get is a graph that contains one outlier that is messing up the whole graph (that particular point contains the value for x of ~ -400000 and it completely masks the entire relationship between x and y).
plot(x,y, ylim=c(-10,10), xlim=c(-10,10))
to limit the x and y axes to -10 to 10 regions.