from java.awt import Color,Font
from java.util import Random
from jhplot  import HPlot,P1D
from math  import sqrt;

c1 = HPlot("Canvas",600,400,2, 1)
c1.visible(1)
c1.setAutoRange()

# keep 2 sets of the data
data=[];

c1.setGTitle("Average of experimental data", Color.blue) #put title
c1.viewHisto(0) # make sure starts from 0

# fill first data set
p1= P1D("data1")
p1.add(10,100,5,5)
p1.add(20,50,5,5)
p1.add(30,80,5,5)
c1.draw(p1)


# fill second data set
p2= P1D("data2")
p2.add(10,40,5,5)
p2.add(20,40,5,5)
p2.add(30,40,5,5)
data.append(p2)
c1.draw(p2)


# fill 3rd data set
p3= P1D("data3")
p3.add(10,50,5,5)
p3.add(20,45,5,5)
p3.add(30,20,5,5)
data.append(p3)
c1.draw(p3)

# add p2,p3 to p1 using weighted average 
p4=p1.addAndAverage(data)
p4.setTitle("Weighted Average")
p4.setColor(Color.blue)


# show points with statistical errors in  y
c1.cd(2,1)
c1.setAutoRange()
c1.draw(p4)