[Matplotlib-users] help visualizing plots
dear list,
can someone tell me why I don't see anything when I run this script?
it is a modified version of the traits example...
I expected to see three plots with one line each...
from enthought.traits.api import HasTraits, Instance, Range, Array,
on_trait_change, Property,cached_property, Bool
from enthought.traits.ui.api import View, Item
from matplotlib.backends.backend_wxagg import FigureCanvasWxAgg
from matplotlib.backends.backend_wx import NavigationToolbar2Wx
from matplotlib.figure import Figure
from matplotlib.axes import Axes
from matplotlib.lines import Line2D
from enthought.traits.ui.api import CustomEditor
import wx
import numpy
def MakePlot(parent, editor):
fig = editor.object.figure
panel = wx.Panel(parent, -1)
canvas = FigureCanvasWxAgg(panel, -1, fig)
toolbar = NavigationToolbar2Wx(canvas)
toolbar.Realize()
sizer = wx.BoxSizer(wx.VERTICAL)
sizer.Add(canvas,1,wx.EXPAND|wx.ALL,1)
sizer.Add(toolbar,0,wx.EXPAND|wx.ALL,1)
panel.SetSizer(sizer)
canvas.SetMinSize((300,600))
return panel
class PlotModel(HasTraits):
figure = Instance(Figure, ())
axes1 = Instance(Axes)
axes2 = Instance(Axes)
axes3 = Instance(Axes)
line1 = Instance(Line2D)
line2 = Instance(Line2D)
line3 = Instance(Line2D)
_draw_pending = Bool(False) #a flag to throttle the redraw rate
# a variable parameter
x = Array(value=numpy.arange(1, 31))
x2 = Array(value=numpy.arange(1, 31))
x3 = Array(value=numpy.arange(1, 31))
# a dependent variable
y = Array(value=numpy.arange(1, 31))
y2 = Array(value=numpy.arange(1, 31))
y3 = Array(value=numpy.arange(1, 31))
traits_view = View(
Item('figure',
editor=CustomEditor(MakePlot),
resizable=True,
show_label=False),
resizable=False,
width=400,
height=750
)
def _axes1_default(self):
return self.figure.add_subplot(311)
def _axes2_default(self):
return self.figure.add_subplot(312)
def _axes3_default(self):
return self.figure.add_subplot(313)
def _line1_default(self):
return self.axes1.plot(self.x, self.y)[0]
def _line2_default(self):
return self.axes2.plot(self.x2, self.y2)[0]
def _line3_default(self):
return self.axes3.plot(self.x3, self.y3)[0]
def redraw(self):
if self._draw_pending:
return
canvas = self.figure.canvas
if canvas is None:
return
def _draw():
canvas.draw()
self._draw_pending = False
wx.CallLater(50, _draw).Start()
self._draw_pending = True
if __name__==__main__:
model = PlotModel()
model.configure_traits(model.redraw())
thank you,
simone
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Re: [Matplotlib-users] plot a data stream with matplotlib
that's nice!!! thank you... anyway, I wanted to take advantage of the Traits implementation of my app... simone 2009/1/23 eliben eli...@gmail.com: Simone Gabbriellini-3 wrote: Dear List, I have some variables I want to plot... the values of those variable change in time... I would like to plot the result with a traditional line plot those variables are traits of a class (don't know if this can make a difference...) is there any example of this with matplotlib? Hi Simone, I think you will find the following examples useful: http://eli.thegreenplace.net/2008/08/01/matplotlib-with-wxpython-guis/ Both feature dynamic plotting of variables that change (either by the user or in time) Eli -- View this message in context: http://www.nabble.com/plot-a-data-stream-with-matplotlib-tp21530559p21622559.html Sent from the matplotlib - users mailing list archive at Nabble.com. -- This SF.net email is sponsored by: SourcForge Community SourceForge wants to tell your story. http://p.sf.net/sfu/sf-spreadtheword ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users -- This SF.net email is sponsored by: SourcForge Community SourceForge wants to tell your story. http://p.sf.net/sfu/sf-spreadtheword ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
Re: [Matplotlib-users] plot a data stream with matplotlib
Ryan, You'd want to look at the animation examples in examples/animation. The exact details will depend upon what backend you want to use, but strip_chart_demo.py, simple_anim_gtk.py, and gtk_timeout.py are good places to start. I tried the strip_chart_demo.py, which is my case, but at least on my Mac OSX system, I don't see anything untill the plot is finished... Simone -- This SF.net email is sponsored by: SourcForge Community SourceForge wants to tell your story. http://p.sf.net/sfu/sf-spreadtheword ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
Re: [Matplotlib-users] plot a data stream with matplotlib
Sorry I made a mistake... what I mean is that I tryed the code in the section GUI neutral animation in pylab from http://www.scipy.org/Cookbook/Matplotlib/Animations, which is my case... and, as I said, nothing is drawn in the window untill the function ends the cycle, then the line is displayed here is the code: from pylab import * import time ion() tstart = time.time() # for profiling x = arange(0,2*pi,0.01)# x-array line, = plot(x,sin(x)) for i in arange(1,200): line.set_ydata(sin(x+i/10.0)) # update the data draw() # redraw the canvas print 'FPS:' , 200/(time.time()-tstart) best regards, simone 2009/1/20 Simone Gabbriellini simone.gabbriell...@gmail.com: Ryan, You'd want to look at the animation examples in examples/animation. The exact details will depend upon what backend you want to use, but strip_chart_demo.py, simple_anim_gtk.py, and gtk_timeout.py are good places to start. I tried the strip_chart_demo.py, which is my case, but at least on my Mac OSX system, I don't see anything untill the plot is finished... Simone -- This SF.net email is sponsored by: SourcForge Community SourceForge wants to tell your story. http://p.sf.net/sfu/sf-spreadtheword ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
Re: [Matplotlib-users] plot a data stream with matplotlib
I see that you first build your array and then display it at the end... is it possible in matplotlib to update the plot while the class is evolving? like: f.evolve(6) f.display() f.evolve(.27) f.display() f.evolve(10) f.display() f.evolve(2) f.display() best regards, simone 2009/1/19 C Lewis chle...@nature.berkeley.edu: #Skeleton example of a taking snapshots of an evolving class import pylab as p from math import log class foo: def __init__(self): self.red = 0 self.green = 1 self.age = 0 self.history = ([self.age],[self.red],[self.green]) def snapshot(self): self.history[0].append(self.age) self.history[1].append(self.red) self.history[2].append(self.green) def evolve(self, time): self.red = self.red + time/2 self.green = self.green * log(time) self.age = self.age + time self.snapshot() def display(self): p.plot(self.history[0],self.history[1],self.history[0],self.history[2]) p.show() if __name__ == '__main__': f = foo() f.snapshot() f.evolve(6); f.evolve(.27);f.evolve(10);f.evolve(2) print f.history f.display() On Jan 18, 2009, at 3:18 PM, Simone Gabbriellini wrote: thanks, it is exactly what I need... I have undestood the logic, I build a plot, put my traits values into an array and then I call the add_current_state_to_plot function to update the plot with the new values... I am an absolute beginner of matplotlib, can you give me a little example of add_current_state_to_plot function? Because I don't know the right way to update: do I have to pass all the array, or just the new values? best regards, simone 2009/1/18 C Lewis chle...@nature.berkeley.edu: Guessing about what you want: Does the class change with time? that is, perhaps you have a class foo, and foo evolves, and you would like to plot a history of some traits of foo, but at any given moment foo only contains its current state? If so, I think you need to have a function in foo, or even a separate class, that takes `snapshots' of foo's traits on one schedule, and stores them, and can also plot them on some schedule. Choosing how to do that is more a python problem than a matplotlib problem; personally, I have something set up so class 'profile' has functions to 'setup_plot' and 'add_current_state_to_plot', and I just have to choose when to call the latter. Or you can just store the values and plot at the end; once you have one list of the times, and a separate list of each trait's history at those times, you're set up for matplotlib plotting, e.g. from pylab import * plot(times, traitA, times, traitB, times, traitC) show() although, while looking for a simple example, I found this: http://matplotlib.sourceforge.net/examples/pylab_examples/plotfile_demo.html which is not totally simple but looks great. C On Jan 18, 2009, at 9:36 AM, Simone Gabbriellini wrote: Dear List, I have some variables I want to plot... the values of those variable change in time... I would like to plot the result with a traditional line plot those variables are traits of a class (don't know if this can make a difference...) is there any example of this with matplotlib? best regards, simone gabbriellini -- This SF.net email is sponsored by: SourcForge Community SourceForge wants to tell your story. http://p.sf.net/sfu/sf-spreadtheword ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users Chloe Lewis Graduate student, Amundson Lab Division of Ecosystem Sciences, ESPM University of California, Berkeley 137 Mulford Hall - #3114 Berkeley, CA 94720-3114 chle...@nature.berkeley.edu -- This SF.net email is sponsored by: SourcForge Community SourceForge wants to tell your story. http://p.sf.net/sfu/sf-spreadtheword ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
[Matplotlib-users] plot a data stream with matplotlib
Dear List, I have some variables I want to plot... the values of those variable change in time... I would like to plot the result with a traditional line plot those variables are traits of a class (don't know if this can make a difference...) is there any example of this with matplotlib? best regards, simone gabbriellini -- This SF.net email is sponsored by: SourcForge Community SourceForge wants to tell your story. http://p.sf.net/sfu/sf-spreadtheword ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
Re: [Matplotlib-users] plot a data stream with matplotlib
thanks, it is exactly what I need... I have undestood the logic, I build a plot, put my traits values into an array and then I call the add_current_state_to_plot function to update the plot with the new values... I am an absolute beginner of matplotlib, can you give me a little example of add_current_state_to_plot function? Because I don't know the right way to update: do I have to pass all the array, or just the new values? best regards, simone 2009/1/18 C Lewis chle...@nature.berkeley.edu: Guessing about what you want: Does the class change with time? that is, perhaps you have a class foo, and foo evolves, and you would like to plot a history of some traits of foo, but at any given moment foo only contains its current state? If so, I think you need to have a function in foo, or even a separate class, that takes `snapshots' of foo's traits on one schedule, and stores them, and can also plot them on some schedule. Choosing how to do that is more a python problem than a matplotlib problem; personally, I have something set up so class 'profile' has functions to 'setup_plot' and 'add_current_state_to_plot', and I just have to choose when to call the latter. Or you can just store the values and plot at the end; once you have one list of the times, and a separate list of each trait's history at those times, you're set up for matplotlib plotting, e.g. from pylab import * plot(times, traitA, times, traitB, times, traitC) show() although, while looking for a simple example, I found this: http://matplotlib.sourceforge.net/examples/pylab_examples/plotfile_demo.html which is not totally simple but looks great. C On Jan 18, 2009, at 9:36 AM, Simone Gabbriellini wrote: Dear List, I have some variables I want to plot... the values of those variable change in time... I would like to plot the result with a traditional line plot those variables are traits of a class (don't know if this can make a difference...) is there any example of this with matplotlib? best regards, simone gabbriellini -- This SF.net email is sponsored by: SourcForge Community SourceForge wants to tell your story. http://p.sf.net/sfu/sf-spreadtheword ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users -- This SF.net email is sponsored by: SourcForge Community SourceForge wants to tell your story. http://p.sf.net/sfu/sf-spreadtheword ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
