commandline session > curve(x^3 – 5*x, from=-4, to=4) > png(file=”RcurveA.png”) > curve(x^3 – 5*x, from=-4, to=4) > dev.off() null device 1 > png(file=”RcurveB.png”) > curve(x^3 – 5*x, from=-4, to=0) > dev.off() null device 1 > png(file=”RcurveC.png”) > curve(x^3 – 5*x, from=10, to=50) > dev.off() null device 1 >