How to plot a Histogram in jython using ptolemy? - plot

Question

Does anyone know how to plot an array of float numbers, 30 elements, as a histogram with ptolemy in Jython?
thank you

Answer 1

from javax.swing import JButton, JFrame, JPanel, JLabel, JMenuBar
from java.awt import GridBagLayout,GridBagConstraints
from java.awt import BorderLayout as BorderLayout
from javax.swing import WindowConstants
from ptolemy import *
from ptolemy.plot import Plot as Plot
from RainfallAnalysis import RainfallAnalysis
from jarray import array;
class Histogram(Plot):
dataset = 0;
theJFrame = JFrame();
def __init__(self):
self.theJFrame.setSize(400, 350); #outer box
self.setSize(350, 300); #graph window
self.setButtons(True); #buttons to print, edit, etc.
self.setMarksStyle("none"); #do not show marks at points
##
# Draw a histogram.
# It is assumed that all bins are of equal size.
# #param name The name to give this histogram in the key
# #param xMin minimum of x-range covered by histogram
# #param xMax maximum of x-range covered by histogram
# #param y array of bin heights; length of array is used to give number of points
def drawHistogram(self,name, xMin, xMax,y):
binWidth = (xMax - xMin)/y.__len__();
self.setBars(binWidth,0.0);
self.setConnected(False); # do not join bars with a line
first = True;
self.setYLabel("Rain Measurement");
self.setXLabel("days");
for i in range(y.__len__()): #loop to add bars to plot
x = i
self.addPoint(self.dataset, x, y[i], not first);
first = False;
self.addLegend(self.dataset, name);
self.dataset = self.dataset+1;
def showIt(self):
gridbag = GridBagLayout();
c = GridBagConstraints();
self.theJFrame.getContentPane().setLayout(gridbag);
c.gridx = 0;
c.gridy = 0;
c.gridwidth = 1;
gridbag.setConstraints(self, c);
self.theJFrame.getContentPane().add(self);
self.theJFrame.setVisible(True);
self.theJFrame.setDefaultCloseOperation(WindowConstants.DISPOSE_ON_CLOSE);
if __name__ == '__main__':
h = Histogram();
rf = RainfallAnalysis();
min = rf.getMin();
max = rf.getMax();
data = rf.getData();
h.drawHistogram("rainfall",min,max,data);
h.showIt();
And data is simply and array of double numbers.