Extract the matrix (numpy array) with which the spectrogram is generated

[hisv95]

Hello,

I would like to ask if there is a way to obtain, from a spectrogram, the data matrix that generates it.
Reviewing the source code of the spectrogram (Obspy), the numpy array (matrix) that generates the image is called “specgram”.
Next, I put an example (which comes within the source code of the spectrogram) where it generates the graph from this variable. ax.imshow(specgram,interpolation=“nearest”, extent=extent, **kwargs).

[trichter]

Hi,

please have alook at this thread:

obspy.imaging.spectrogram - output data

Hi there, Does anybody know how to output the data from the obspy function spectrogram (not only as an image file)? Description of work flow: 1.read in one seismic trace (SEGY format) - OK calculate and plot the spectrogram using obspy.imaging.spectrogram - OK output the image of the spectrogram as a PNG file - OK output the data points, as floating numbers - NOT POSSIBLE ?? My code is the following: st=obspy.read(\seismic\trace.segy) st_spec=st.spectrogram(log=True, wlen=0.02, …