from jhplot  import  *
from java.awt import Color

p1=P1D("X-Y data points")

f=F1D("10*cos(0.1*x)",0,100)
for i in range(100):
         p1.add(i,f.eval(i))
        
c1 = HPlot("Canvas")
c1.visible()
c1.setAutoRange()
p2=p1.derivative()
p2.setColor(Color.red)
p2.setStyle("l")
c1.draw(p1)
c1.draw(p2)