I know there is a problem with visualizing plots in pycharm, but I didn't find a solution to view plots.
Is there anyone who can help me that knows how to do it?
Thanks in advance.
import matplotlib.pyplot as plt
plt.style.use('ggplot')
df['Score'].value_counts().sort_index().plot(kind='bar', title='Count of Reviews by Stars',
figsize=(10, 5))
Can you add plt.show() at the end of your script?
import matplotlib.pyplot as plt
plt.style.use('ggplot')
df['Score'].value_counts().sort_index().plot(kind='bar', title='Count of Reviews by Stars',
figsize=(10, 5))
plt.show()
Try putting this at the top of your script:
import matplotlib
matplotlib.use('TkAgg')
import matplotlib.pyplot as plt
Related
This question already has answers here:
How to make IPython notebook matplotlib plot inline
(11 answers)
Closed 4 years ago.
import matplotlib.pyplot as plt
%matplotlib inline
fig=plt.figure()
plt.show()
Output is:
matplotlib.figure.Figure at 0x536ea70
I want to see empty plot and i was going through a pycon tutorial the same code produced a empty plot.
IPython will not generate any output for figures that do not contain an axes.
If you add an axes to your figure, the figure will show fine.
%matplotlib inline
import matplotlib.pyplot as plt
fig, ax = plt.subplots()
plt.show()
or
%matplotlib inline
import matplotlib.pyplot as plt
plt.gca()
plt.show()
If you then remove the axes, it will again show the returned python string again.
The solution to show a completely empty figure with the inline backend is hence to add an axes but then turn it invisible.
%matplotlib inline
import matplotlib.pyplot as plt
fig, ax = plt.subplots()
ax.set_visible(False)
plt.show()
If I plot with ipython, I automatically see the x/y coordinates when I move with the mouse over the canvas (see bottom right in screenshot):
import matplotlib.pyplot as plt
import numpy as np
my_random = np.random.random(5)
plt.plot(my_random)
plt.show()
How can the same achieved with Pycharm (my plots appear in the SciView toolwindow)?
If not: is there perhaps an easy workaround for it? (and do I have more possibilities if the plot does not appear in the SciView toolwindow?)
using TkAgg it works:
import matplotlib
matplotlib.use('TkAgg')
import numpy as np
import matplotlib.pyplot as plt
my_random = np.random.random(5)
plt.plot(my_random)
plt.show()
Edit: My question is not in regards to an "animation" per se. My question here, is simply about how to continuously show, a new inline image, in a for loop, within an Ipython notebook.
In essence, I would like to show an updated image, at the same location, inline, and have it update within the loop to show. So my code currently looks something like this:
import numpy as np
import matplotlib
import matplotlib.pyplot as plt
from IPython import display
%matplotlib inline
fig, ax = plt.subplots(nrows = 1, ncols = 1, figsize=(10, 10))
for ii in xrange(10):
im = np.random.randn(100,100)
ax.cla()
ax.imshow(im, interpolation='None')
ax.set_title(ii)
plt.show()
The problem is that this currently just..., well, shows the first image, and then it never changes.
Instead, I would like it to simply show the updated image at each iteration, inline, at the same place. How do I do that? Thanks.
I am not sure that you can do this without animation. Notebooks capture the output of matplotlib to include in the cell once the plotting is over. The animation framework is rather generic and covers anything that is not a static image. matplotlib.animation.FuncAnimation would probably do what you want.
I adapted your code as follows:
%matplotlib notebook
import matplotlib.pyplot as plt
import numpy as np
import matplotlib.animation
f = plt.figure()
ax = f.gca()
im = np.random.randn(100,100)
image = plt.imshow(im, interpolation='None', animated=True)
def function_for_animation(frame_index):
im = np.random.randn(100,100)
image.set_data(im)
ax.set_title(str(frame_index))
return image,
ani = matplotlib.animation.FuncAnimation(f, function_for_animation, interval=200, frames=10, blit=True)
Note: You must restart the notebook for the %matplotlib notebook to take effect and use a backend that supports animation.
EDIT: There is normally a way that is closer to your original question but it errors on my computer. In the example animation_demo there is a plain "for loop" with a plt.pause(0.5) statement that should also work.
You can call figure.canvas.draw() each time you append something new to the figure. This will refresh the plot (from here). Try:
import numpy as np
import matplotlib
matplotlib.use('TkAgg')
import matplotlib.pyplot as plt
from IPython import display
from time import sleep
fig = plt.figure()
ax = fig.gca()
fig.show()
for ii in range(10):
im = np.random.randn(100, 100)
plt.imshow(im, interpolation='None')
ax.set_title(ii)
fig.canvas.draw()
sleep(0.1)
I could not test this in an IPython Notebook, however.
In Pycharm
import matplotlib.pyplot as plt
plt.interactive(True)
plt.plot([1,2,3,4])
The figure showed up and disappeared instantly.
How to set the figure to keep showing?
Since you are in interactive mode the figure will not stay open. You may simply not use interactive mode,
import matplotlib.pyplot as plt
plt.plot([1,2,3,4])
plt.show()
or you may turn it off before showing the figure.
import matplotlib.pyplot as plt
plt.interactive(True)
plt.plot([1,2,3,4])
plt.ioff()
plt.show()
Use plt.show(), i.e.:
import matplotlib.pyplot as plt
plt.plot([1,2,3,4])
plt.show()
I've been using matplotlib for five months now on a daily basis, and I still find creation of new figures confusing.
Usually I create a figure with 2x2 subplots using, for example, somthing like:
import matplotlib.pyplot as plt
import itertools as it
fig,axes = plt.subplots(2,2)
axit = (ax for ax in it.chain(*axes))
for each of four data series I want to plot:
ax = next(axit)
ax.plot(...)
The question I have now is: how can operate completely independently of pyplot, ie, how can I create a figure, populate it with plots, make style changes, and only tell that figure to appear at the exact moment I want it to appear. Here is what I am having trouble with:
import matplotlib as mpl
gs = gridspec.GridSpec(2,2)
fig = mpl.figure.Figure()
ax1 = fig.add_subplot(gs[0])
ax1.plot([1,2,3])
ax2 = fig.add_subplot(gs[1])
ax2.plot([3,2,1])
After running the above, the only thing that comes to mind would be to use:
plt.draw()
But this does not work. What is missing to make the figure with the plots appear? Also, is
fig = mpl.figure.Figure()
all I have to do to create the figure without pyplot?
This works for me without matplotlib.pyplot
import sys
from PyQt5 import QtWidgets
from matplotlib.backends.backend_qt5agg import (
FigureCanvasQTAgg as FigureCanvas)
from matplotlib.figure import Figure
import numpy as np
fig=Figure()
canvas=FigureCanvas(fig)
ax=canvas.figure.add_subplot(111)
x=np.arange(-5,5,0.1)
y=np.sin(x)
ax.plot(x,y)
canvas.show()
app=QtWidgets.QApplication(sys.argv)
app.exec()
You could attach a suitable backend to your figure manually and then show it:
from matplotlib.backends import backend_qt4agg # e.g.
backend_qt4agg.new_figure_manager_given_figure(1, fig)
fig.show()
... but why not use pyplot?