Bug report

Bug summary

the docstring of parameterFs ofmatplotlib.pyplot.specgram() says that the default value is2 but the default value in the function signature isNone.

Code for reproduction

point your browser tohttps://matplotlib.org/devdocs/api/_as_gen/matplotlib.pyplot.specgram.html or do:

importmatplotlib.pyplotasplthelp(plt.specgram)

Actual outcome

specgram(x, NFFT=None, Fs=None, Fc=None, ......Fs : scalar        The sampling frequency (samples per time unit).  It is used        to calculate the Fourier frequencies, freqs, in cycles per time        unit. The default value is 2.

Expected outcome

Either writeNone in the docstring or make change the default value of Fs to 2.

Matplotlib version

• Operating System: OSX 10.11.6
• Matplotlib Version: 2.0.2
• Python Version: 3.5.4
• Jupyter Version (if applicable): notebook server 5.0.0, IPython 6.1.0
• Other Libraries: N/A

Installed with pip in a conda environment.