Isolated points missing in pdf #7293
Description
Dear developers,
when plotting single points surrounded by np.nan values, points are shown in a regular plot, but are omitted when saved via pdf backend. Minimal example:
import numpy as np
import matplotlib.pyplot as plt
a = np.array([1,np.nan,2,np.nan,3,3.5,4])
plt.plot(a, marker='o')
plt.show()
generates a perfect plot with the 5 points shown:
but directly saving it via pdf backend omitts the values isolated by np.nans:
import numpy as np
import matplotlib.pyplot as plt
import matplotlib.backends.backend_pdf as pdf
a = np.array([1,np.nan,2,np.nan,3,3.5,4])
fig1 = plt.figure()
sub = fig1.add_subplot(1,1,1)
sub.plot(a,marker='o')
pp1 = pdf.PdfPages('foo.pdf')
fig1.savefig(pp1, format='pdf')
pp1.close()
like so:
I would be glad for any help.
System:
Ubuntu 14.02
Python 2.7.6
Numpy 1.11.2
Matplotlib 1.5.3