how can i plot a specrtogram in python using Obspy?

Question

First, I display the waveform by SAC file and I want to plot a spectrogram.

st = read('SAC file HERE', header=0, index_col=0, parse_dates=True, squeeze=True)
pyplot.show()
st.plot()

That will show the waveform, so how can I put it in a spectrogram?

Answer 1

This is an example:

import obspy

st=obspy.read("https://examples.obspy.org/RJOB_061005_072159.ehz.new")

st.spectrogram(log=True, title='BW.RJOB ' + str(st[0].stats.starttime))