[Matplotlib-users] clear figure, ax, etc
what does figure.clear() do ? what about ax.clear()? The doc is kind of sparce. The 2 function/method above do nothing on my setup. ax.clear() I was expecting to mean 'erase all the 2DLines' figure.clear() I was expecting 'hide all the axes' Now figure.del_axes(self.figure.axes) does not do anything either How can I remove my axes from the figure? -- Emmanuel -- Better than sec? Nothing is better than sec when it comes to monitoring Big Data applications. Try Boundary one-second resolution app monitoring today. Free. http://p.sf.net/sfu/Boundary-dev2dev___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
Re: [Matplotlib-users] Clear Figure
Hi Jae-Joon Lee,
I tried it but unfortunately it didn't work too. After the Figure is
cleared I cannot plot again.
I've attached the whole code that I'm trying to do this, I hope it could
help a little bit. I modified the original example just to test this
feature.
Thanks!
Bernardo M. Rocha
Jae-Joon Lee wrote:
I guess you need to put draw() after plot()
self.canvas.figure.clf()
self.canvas.axes.plot([1.,2.,4.])
self.canvas.draw()
Let us know if it does not help.
-JJ
On Sat, Oct 4, 2008 at 7:17 PM, rocha [EMAIL PROTECTED] wrote:
Hi Guys,
I need to clear the Figure after the user has clicked the some button in
PyQt, but when I try to plot the graphics again nothing appear. In
ipython it works, but when I try it inside my application it does not
work. What am I missing?
Inside my MplCanvas class (actually it is a QWidget - see
embedding_in_qt4.py in matplotlib examples file - user_interface) I have
this code:
self.fig = Figure(figsize=(self.width, self.height), dpi=dpi)
And then in my main application I'm trying to do:
self.canvas.figure.clf()
self.canvas.draw()
self.canvas.axes.plot([1.,2.,4.])
and nothing is plotted. The Figure is totally gray. I tried to do the
same thing in embedding_in_qt4.py example, modifying some parts, but it
didn't work too.
Do you have any suggestions?
Thanks!
Best regards,
Bernardo M. Rocha
-
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#!/usr/bin/env python
# embedding_in_qt4.py --- Simple Qt4 application embedding matplotlib canvases
#
# Copyright (C) 2005 Florent Rougon
# 2006 Darren Dale
#
# This file is an example program for matplotlib. It may be used and
# modified with no restriction; raw copies as well as modified versions
# may be distributed without limitation.
import sys, os, random
from PyQt4 import QtGui, QtCore
from numpy import arange, sin, pi
from matplotlib.backends.backend_qt4agg import FigureCanvasQTAgg as FigureCanvas
from matplotlib.figure import Figure
progname = os.path.basename(sys.argv[0])
progversion = 0.1
class MyMplCanvas(FigureCanvas):
Ultimately, this is a QWidget (as well as a FigureCanvasAgg, etc.).
def __init__(self, parent=None, width=5, height=4, dpi=100):
fig = Figure(figsize=(width, height), dpi=dpi)
self.axes = fig.add_subplot(111)
# We want the axes cleared every time plot() is called
self.axes.hold(False)
self.compute_initial_figure()
#
FigureCanvas.__init__(self, fig)
self.setParent(parent)
FigureCanvas.setSizePolicy(self,
QtGui.QSizePolicy.Expanding,
QtGui.QSizePolicy.Expanding)
FigureCanvas.updateGeometry(self)
def compute_initial_figure(self):
pass
class MyStaticMplCanvas(MyMplCanvas):
Simple canvas with a sine plot.
def compute_initial_figure(self):
t = arange(0.0, 3.0, 0.01)
s = sin(2*pi*t)
self.axes.plot(t, s)
class MyDynamicMplCanvas(MyMplCanvas):
A canvas that updates itself every second with a new plot.
def __init__(self, *args, **kwargs):
MyMplCanvas.__init__(self, *args, **kwargs)
timer = QtCore.QTimer(self)
QtCore.QObject.connect(timer, QtCore.SIGNAL(timeout()), self.update_figure)
timer.start(1000)
def compute_initial_figure(self):
self.axes.plot([0, 1, 2, 3], [1, 2, 0, 4], 'r')
def update_figure(self):
# Build a list of 4 random integers between 0 and 10 (both inclusive)
l = [ random.randint(0, 10) for i in xrange(4) ]
self.axes.plot([0, 1, 2, 3], l, 'r')
self.draw()
def limpa(self):
self.figure.clf()
self.draw()
class ApplicationWindow(QtGui.QMainWindow):
def __init__(self):
QtGui.QMainWindow.__init__(self)
self.setAttribute(QtCore.Qt.WA_DeleteOnClose)
self.setWindowTitle(application main window)
self.file_menu = QtGui.QMenu('File', self)
self.file_menu.addAction('Quit', self.fileQuit,
QtCore.Qt.CTRL + QtCore.Qt.Key_Q)
self.menuBar().addMenu(self.file_menu)
self.help_menu = QtGui.QMenu('Help', self)
self.menuBar().addSeparator()
self.menuBar().addMenu(self.help_menu)
self.help_menu.addAction('About', self.teste)
self.main_widget = QtGui.QWidget(self)
l = QtGui.QVBoxLayout(self.main_widget)
sc =
Re: [Matplotlib-users] Clear Figure
On Sun, Oct 5, 2008 at 3:50 AM, rocha [EMAIL PROTECTED] wrote: self.canvas.figure.clf() self.canvas.draw() self.canvas.axes.plot([1.,2.,4.]) and nothing is plotted. The Figure is totally gray. I tried to do the same thing in embedding_in_qt4.py example, modifying some parts, but it didn't work too. Do you have any suggestions? The problem appears to be that you have kept a copy of your old axes around (self.canvas.axes is not a mpl construct, so it looks like you have attached an axes instance to your canvas instance). You will want to either not clear your figure and clear your axes instead ax.cla() ax.plot([1,2,3]) canvas.draw() or clear your figure, create a new axes, plot and then draw fig.clf() ax = fig.add_subplot(111) ax.plot([1,2,3]) ax.draw() Be careful with the name axes to refer to a single axes instance attached to your canvas. In the mpl scheme, axes is a list of Axes instance and is attached to the Figure instance. See for example http://matplotlib.sourceforge.net/doc/html/users/artists.html JDH - This SF.Net email is sponsored by the Moblin Your Move Developer's challenge Build the coolest Linux based applications with Moblin SDK win great prizes Grand prize is a trip for two to an Open Source event anywhere in the world http://moblin-contest.org/redirect.php?banner_id=100url=/ ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
[Matplotlib-users] Clear Figure
Hi Guys, I need to clear the Figure after the user has clicked the some button in PyQt, but when I try to plot the graphics again nothing appear. In ipython it works, but when I try it inside my application it does not work. What am I missing? Inside my MplCanvas class (actually it is a QWidget - see embedding_in_qt4.py in matplotlib examples file - user_interface) I have this code: self.fig = Figure(figsize=(self.width, self.height), dpi=dpi) And then in my main application I'm trying to do: self.canvas.figure.clf() self.canvas.draw() self.canvas.axes.plot([1.,2.,4.]) and nothing is plotted. The Figure is totally gray. I tried to do the same thing in embedding_in_qt4.py example, modifying some parts, but it didn't work too. Do you have any suggestions? Thanks! Best regards, Bernardo M. Rocha - This SF.Net email is sponsored by the Moblin Your Move Developer's challenge Build the coolest Linux based applications with Moblin SDK win great prizes Grand prize is a trip for two to an Open Source event anywhere in the world http://moblin-contest.org/redirect.php?banner_id=100url=/ ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
Re: [Matplotlib-users] Clear Figure
I guess you need to put draw() after plot() self.canvas.figure.clf() self.canvas.axes.plot([1.,2.,4.]) self.canvas.draw() Let us know if it does not help. -JJ On Sat, Oct 4, 2008 at 7:17 PM, rocha [EMAIL PROTECTED] wrote: Hi Guys, I need to clear the Figure after the user has clicked the some button in PyQt, but when I try to plot the graphics again nothing appear. In ipython it works, but when I try it inside my application it does not work. What am I missing? Inside my MplCanvas class (actually it is a QWidget - see embedding_in_qt4.py in matplotlib examples file - user_interface) I have this code: self.fig = Figure(figsize=(self.width, self.height), dpi=dpi) And then in my main application I'm trying to do: self.canvas.figure.clf() self.canvas.draw() self.canvas.axes.plot([1.,2.,4.]) and nothing is plotted. The Figure is totally gray. I tried to do the same thing in embedding_in_qt4.py example, modifying some parts, but it didn't work too. Do you have any suggestions? Thanks! Best regards, Bernardo M. Rocha - This SF.Net email is sponsored by the Moblin Your Move Developer's challenge Build the coolest Linux based applications with Moblin SDK win great prizes Grand prize is a trip for two to an Open Source event anywhere in the world http://moblin-contest.org/redirect.php?banner_id=100url=/ ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users - This SF.Net email is sponsored by the Moblin Your Move Developer's challenge Build the coolest Linux based applications with Moblin SDK win great prizes Grand prize is a trip for two to an Open Source event anywhere in the world http://moblin-contest.org/redirect.php?banner_id=100url=/ ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
