= How to use Plot - Part 3 (Phoenix) =
'''Keywords :''' [[PyPlot|Plot]], Graph, Point, Sine, Cosine, PolyLine, PlotCanvas, PlotGraphics.
<<TableOfContents>>
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= Demonstrating : =
__'''''Tested''' py3.x, wx4.x and Win10. ''__
Are you ready to use some samples ? ;)
Test, modify, correct, complete, improve and share your discoveries ! (!)
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== Plotting : ==
wxPython comes with a simple plotting library.
Features include zooming, legends and a grid.
Possible graphs :
* Scatter
* Line
* Bar
We must install the Numeric library.
Other plotting libraries are :
{{{Gnuplot}}} or {{{MatPlotLib}}}.
These must be installed separately.
To create a graph, we follow these steps :
'''1)''' Define our data :
We insert your data in a list of tuples.
Each tuple will have two items.
data = [(x1, y1), (x2, y2), (x3, y3), (x4, y4), (x5, y5), (x6, y6)]
'''2)''' Create a plotting canvas we create an object of a {{{PlotCanvas}}} as a child of a frame :
{{{
frame = wx.Frame(self, -1)
client = wx.lib.plot.PlotCanvas(frame)
}}}
'''3)''' Create a graph There are two classes :
{{{PolyLine}}} and {{{PolyMarker}}}. {{{PolyLine}}} class defines line graphs.
Its constructor is :
{{{
PolyLine(list data, wx.Colour colour, integer width, integer style, string legend)
}}}
''- data'' parameter is the data to be displayed.
''- colour'' defines the colour of the line.
''- width'' is the width of the pen, used to draw the graph.
- Possible ''style'' flags are wx.Pen styles.
''- legend'' defines the line legend.
{{{PolyMarker}}} can be used to create scatter graphs and bar graphs as well.
Constructor :
{{{
PolyMarker(list data, wx.Colour colour, integer size, wx.Colour fillcolour, integer fillstyle, string markershape, string legend)
}}}
''fillstyle'' is also various wx.Pen styles.
Marker Shapes :
* circle
* dot
* square
* triangle
* triangle_down
* cross
* plus
'''4)''' Create a graph container :
Graph container is a container that holds a graph object and its title and labels.
{{{
PlotGraphics(list objects, string title, string xLabel, string yLabel)
}}}
* objects is a list of one or more graph objects
* title - title shown at top of graph
* xLabel - label shown on x-axis
* yLabel - label shown on y-axis
'''5)''' Draw a graph :
Finally we draw the graph.
{{{
client.Draw(gc, xAxis=(0,15), yAxis=(0,15))
}}}
gc is a graph container object. xAxis and yAxis define the range of the axes (info by '''ZetCode / Jan Bodnar''').
=== First example ===
{{attachment:img_sample_one.png}}
{{{#!python
# sample_one.py
"""
Author : Zetcode
Created : Apr., 2007
Updated : Nov. 16, 2020 by Ecco
"""
import wx
import wx.lib.plot as plot
# MyPlot
# MyApp
#---------------------------------------------------------------------------
class MyPlot(wx.Dialog):
def __init__(self, parent, id, title):
wx.Dialog.__init__(self, parent, id, title, size=(180, 280))
#------------
icon = wx.Icon("./icons/wxwin.ico")
self.SetIcon(icon)
#------------
self.data = [(1,2), (2,3), (3,5), (4,6), (5,8), (6,8), (10,10)]
btn1 = wx.Button(self, 1, '&Scatter', (50,50))
btn2 = wx.Button(self, 2, '&Line', (50,90))
btn3 = wx.Button(self, 3, '&Bar', (50,130))
btn4 = wx.Button(self, 4, '&Quit', (50,170))
#------------
self.Bind(wx.EVT_BUTTON, self.OnScatter, id=1)
self.Bind(wx.EVT_BUTTON, self.OnLine, id=2)
self.Bind(wx.EVT_BUTTON, self.OnBar, id=3)
self.Bind(wx.EVT_BUTTON, self.OnQuit, id=4)
self.Bind(wx.EVT_CLOSE, self.OnQuit)
#-----------------------------------------------------------------------
def OnScatter(self, event):
frm = wx.Frame(self, -1, 'Scatter', size=(600, 450))
icon = wx.Icon("./icons/wxwin.ico")
frm.SetIcon(icon)
pnl = wx.Panel(frm, -1)
pnl.SetBackgroundColour(wx.WHITE)
#------------
client = plot.PlotCanvas(pnl)
markers = plot.PolyMarker(self.data, legend='', colour='pink', marker='triangle_down', size=1)
gc = plot.PlotGraphics([markers], 'Scatter Graph', 'X Axis', 'Y Axis')
client.Draw(gc, xAxis=(0,15), yAxis=(0,15))
#------------
mainSizer = wx.BoxSizer(wx.VERTICAL)
mainSizer.Add(client, 1, wx.EXPAND | wx.ALL, 10)
pnl.SetSizer(mainSizer)
#------------
frm.Show(True)
def OnLine(self, event):
frm = wx.Frame(self, -1, 'Line', size=(600, 450))
icon = wx.Icon("./icons/wxwin.ico")
frm.SetIcon(icon)
pnl = wx.Panel(frm, -1)
pnl.SetBackgroundColour(wx.WHITE)
#------------
client = plot.PlotCanvas(pnl)
line = plot.PolyLine(self.data, legend='', colour='pink', width=1)
gc = plot.PlotGraphics([line], 'Line Graph', 'X Axis', 'Y Axis')
client.Draw(gc, xAxis= (0,15), yAxis= (0,15))
#------------
mainSizer = wx.BoxSizer(wx.VERTICAL)
mainSizer.Add(client, 1, wx.EXPAND | wx.ALL, 10)
pnl.SetSizer(mainSizer)
#------------
frm.Show(True)
def OnBar(self, event):
frm = wx.Frame(self, -1, 'Bar', size=(600, 450))
icon = wx.Icon("./icons/wxwin.ico")
frm.SetIcon(icon)
pnl = wx.Panel(frm, -1)
pnl.SetBackgroundColour(wx.WHITE)
#------------
client = plot.PlotCanvas(pnl)
bar1 = plot.PolyLine([(1, 0), (1,5)], legend='', colour='gray', width=25)
bar2 = plot.PolyLine([(3, 0), (3,8)], legend='', colour='gray', width=25)
bar3 = plot.PolyLine([(5, 0), (5,12)], legend='', colour='gray', width=25)
bar4 = plot.PolyLine([(6, 0), (6,2)], legend='', colour='gray', width=25)
gc = plot.PlotGraphics([bar1, bar2, bar3, bar4],'Bar Graph', 'X Axis', 'Y Axis')
client.Draw(gc, xAxis=(0,15), yAxis=(0,15))
#------------
mainSizer = wx.BoxSizer(wx.VERTICAL)
mainSizer.Add(client, 1, wx.EXPAND | wx.ALL, 10)
pnl.SetSizer(mainSizer)
#------------
frm.Show(True)
def OnQuit(self, event):
self.Destroy()
#---------------------------------------------------------------------------
class MyApp(wx.App):
def OnInit(self):
dlg = MyPlot(None, -1, 'Plot.py')
dlg.Show(True)
dlg.Centre()
return True
#---------------------------------------------------------------------------
app = MyApp(0)
app.MainLoop()
}}}
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= Download source =
[[attachment:source.zip]]
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= Additional Information =
'''Link :'''
https://www.blog.pythonlibrary.org/2010/09/27/wxpython-pyplot-graphs-with-python/
- - - - -
https://wiki.wxpython.org/TitleIndex
https://docs.wxpython.org/
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= Thanks to =
Jan Bodnar / ZetCode (sample_one.py coding), the wxPython community...
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= About this page =
Date (d/m/y) Person (bot) Comments :
16/11/20 - Ecco (Created page for wxPython Phoenix).
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= Comments =
- blah, blah, blah....