How to draw circles in logscale plots

Community matplotlib-users
1

Hello,

how can I plot circles or other shapes in plots which have logarithmic axis?
I have a grid of 3 plots and want to plot some kind of sketches in the lower
right corner of
each subplot. How should I do that?

import numpy as np
from matplotlib import pyplot as plt
from matplotlib import gridspec

fig = plt.figure(figsize=(6, 10))
gs = gridspec.GridSpec(3, 1, height_ratios=[1.5, 1, 1])#, height_ratios=[2,
1, 1])
ax0 = plt.subplot(gs[0])
ax1 = plt.subplot(gs[1])
ax2 = plt.subplot(gs[2])
plt.setp(ax_new.get_yticklabels(), visible=False)
plt.setp(ax_new.get_xticklabels(), visible=False)
ax_new = fig.add_axes([0,0,1,1], frameon=False,aspect="equal")
ax_new.axes.get_yaxis().set_visible(False)
ax_new.axes.get_xaxis().set_visible(False)
circle1=plt.Circle((0.2,0.0),0.05, color="0.8")
circle2=plt.Circle((0.4,0.0),0.05, color="0.8")
ax_new.add_artist(circle1)
ax_new.add_artist(circle2)

ax0.semilogx(x,x**2, "k-", linewidth=2)
ax1.semilogx(x,x**3, "k--", linewidth=2)
ax2.semilogx(x,np.exp(-x)+x**4, "k-.", linewidth=2)
plt.tight_layout()
plt.show()

···

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2

A quick-n-dirty way would be to use markers via the scatter() function. Just set the facecolor to ‘none’, and some very large markersize value.

Ben Root

···

On Wed, Apr 8, 2015 at 12:49 PM, LowDepth <Hagbard15@…380…> wrote:

Hello,

how can I plot circles or other shapes in plots which have logarithmic axis?

I have a grid of 3 plots and want to plot some kind of sketches in the lower

right corner of

each subplot. How should I do that?

import numpy as np

from matplotlib import pyplot as plt

from matplotlib import gridspec

fig = plt.figure(figsize=(6, 10))

gs = gridspec.GridSpec(3, 1, height_ratios=[1.5, 1, 1])#, height_ratios=[2,

1, 1])

ax0 = plt.subplot(gs[0])

ax1 = plt.subplot(gs[1])

ax2 = plt.subplot(gs[2])

plt.setp(ax_new.get_yticklabels(), visible=False)

plt.setp(ax_new.get_xticklabels(), visible=False)

ax_new = fig.add_axes([0,0,1,1], frameon=False,aspect=“equal”)

ax_new.axes.get_yaxis().set_visible(False)

ax_new.axes.get_xaxis().set_visible(False)

circle1=plt.Circle((0.2,0.0),0.05, color=“0.8”)

circle2=plt.Circle((0.4,0.0),0.05, color=“0.8”)

ax_new.add_artist(circle1)

ax_new.add_artist(circle2)

ax0.semilogx(x,x**2, “k-”, linewidth=2)

ax1.semilogx(x,x**3, “k–”, linewidth=2)

ax2.semilogx(x,np.exp(-x)+x**4, “k-.”, linewidth=2)

plt.tight_layout()

plt.show()

–

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