English: The file was generated via the following code, which was adapted from Wikipedia Logistic map article:

import numpy as np
import matplotlib.pyplot as plt

preset = 2
if preset == 1: # Complete diagram
  saveFigure = True
  markerSize = 0.001 # orig. 0.02
  markerStyle = "," # . - point; , - pixel
  cInterval = (-2.1, 0.26)
  #cInterval = (-1.4011551890, -1.3940462)
  cResolution = 0.0003
  mapIterationCount = 1000  # (orig. 600)
  lastMapIterationCountToPlot = 1000 # (orig. 200)
  startingIterationValue = 0
  fileName = "MandelbrotMapOrbitDiag.png"
elif preset == 2: # Zoom to a region near -2
  saveFigure = True
  markerSize = 0.001 # orig. 0.02
  markerStyle = "," # . - point; , - pixel
  cInterval = (-2, -1.99)
  cResolution = 1E-6
  mapIterationCount = 1000
  lastMapIterationCountToPlot = 1000
  startingIterationValue = 0
  fileName = "MandelbrotMapOrbitDiag_ZoomNearM2.png"

if cInterval[0] < -2 or cInterval[1] > 0.25:
  yLim = (-2.2, 2.5)
else:
  yLim = (-2, 2)

lims = np.zeros(mapIterationCount)

fig, biax = plt.subplots()
fig.set_size_inches(16, 9)

lims[0] = startingIterationValue
for c in np.arange(cInterval[0], cInterval[1], cResolution):
  for i in xrange(mapIterationCount - 1):
    lims[i + 1] = lims[i] * lims[i] + c
    if lims[i] > 2:
        lims[i + 1] = lims[i] # Allow plotting of c values outside of Mandelbrot set, diverging ones

  biax.plot([c] * lastMapIterationCountToPlot,
            lims[(mapIterationCount - lastMapIterationCountToPlot):], "b.",
            markersize=markerSize,
            marker=markerStyle)

biax.set(xlabel="c", ylabel="x",
         title="Mandelbrot set quadratic map for real values - bifurcation diagram/orbit diagram" + "\n" +
               "c resolution: " + str(cResolution) +
               ", iteration count: " + str(mapIterationCount) +
               ", last values to plot count: " + str(lastMapIterationCountToPlot))

biax.set_ylim(yLim[0], yLim[1])
if saveFigure:
  plt.savefig(fileName, dpi=600)
else:
  plt.show()