If you're using pyplot.specgram (i.e. "from pylab import *;
specgram(...)"), note that the plot is in dB, hence the negative
values.
I'm surprised this fact isn't mentioned in the documentation:
http://matplotlib.org/api/pyplot_api.html?highlight=specgram#matplotlib.pyplot.specgram
However, when i
Hi,
If you trace back into the code further, you will see that the Pxx is
computed as X = fft(x), Pxx = X * conj(X) which is real, but the data
type will be complex with a ~0 imaginary part (up to floating point
precision). Thus the Pxx.real is just to ensure that the resulting
data type is real in
Hi,
not 100% sure this is a bug, but here goes:
In file matplotlib/lib/matplotlib/mlab.py, the functions psd (power spectral
density) and specgram returns the real part of the fourier transform.
% grep -n Pxx.real mlab.py
390:return Pxx.real,freqs
470:Pxx = Pxx.real #Needed since helper
On Mon, Nov 12, 2012 at 11:43 AM, Nils Wagner wrote:
> Hi all,
>
> how can I hide ticks and/or labels in the presence of sharex=ax. Only
> the last subplot 313 should have ticks and labels.
>
> import matplotlib.pyplot as plt
> fig=plt.figure(0,figsize=(16,24))
>
> ax = fig.add_subplot(311)
> ax.s
Hi all,
how can I hide ticks and/or labels in the presence of sharex=ax. Only
the last subplot 313 should have ticks and labels.
import matplotlib.pyplot as plt
fig=plt.figure(0,figsize=(16,24))
ax = fig.add_subplot(311)
ax.set_xticks([])
ax.set_xticklabels('')
ax1 = fig.add_subplot(312,sharex=
