How do you change the size of figures drawn with matplotlib?
How do you change the size of figure drawn with matplotlib?
figure tells you the call signature:
from matplotlib.pyplot import figure figure(num=None, figsize=(8, 6), dpi=80, facecolor='w', edgecolor='k')
figure(figsize=(1,1)) would create an inch-by-inch image, which would be 80-by-80 pixels unless you also give a different dpi argument.
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If you've already got the figure created you can quickly do this:
fig = matplotlib.pyplot.gcf() fig.set_size_inches(18.5, 10.5) fig.savefig('test2png.png', dpi=100)
To propagate the size change to an existing gui window add
fig.set_size_inches(18.5, 10.5, forward=True)
As per the official Matplotlib guide, usage of the
pylabmodule is no longer recommended. Please consider using the
matplotlib.pyplotmodule instead, as described by this other answer.
The following seems to work:
from pylab import rcParams rcParams['figure.figsize'] = 5, 10
This makes the figure's width 5 inches, and its height 10 inches.
The Figure class then uses this as the default value for one of its arguments.
There is also this workaround in case you want to change the size without using the figure environment. So in case you are using
plt.plot() for example, you can set a tuple with width and height.
import matplotlib.pyplot as plt plt.rcParams["figure.figsize"] = (20,3)
This is very useful when you plot inline (e.g. with IPython Notebook). As @asamaier noticed is preferable to not put this statement in the same cell of the imports statements.
Conversion to cm
figsize tuple accepts inches so if you want to set it in centimetres you have to divide them by 2.54 have a look to this question.
Please try a simple code as following:
from matplotlib import pyplot as plt plt.figure(figsize=(1,1)) x = [1,2,3] plt.plot(x, x) plt.show()
You need to set the figure size before you plot.
In case you're looking for a way to change the figure size in Pandas, you could do e.g.:
df is a Pandas dataframe. Or, to use existing figure or axes
fig, ax = plt.subplots(figsize=(10,5)) df['some_column'].plot(ax=ax)
If you want to change the default settings, you could do the following:
import matplotlib matplotlib.rc('figure', figsize=(10, 5))