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how to alter the range of values of a plot generated by spectrogram function


how to alter the range of values of a plot generated by spectrogram function

By : walnutcon
Date : November 20 2020, 01:01 AM
Hope that helps Idea: get the axis the was used to plot the spectrogram and set its properties accordingly. For example, supposing you'd want to restrict the x range to [0, 0.5] and y to [100, 200], then:
code :
%'old code here'
%' . . . '
spectrogram(x4,128,50,NFFT);

%'new code here'
axis(get(gcf,'children'), [0, 0.5, 100, 200]);


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Select/alter range of values in jquery function

Select/alter range of values in jquery function


By : 54chi
Date : March 29 2020, 07:55 AM
I wish this help you Here is the code , Just check for those values ?
code :
$('#printlocs').on('change', function() {
    $('#loc1').prop('disabled', (this.value == '0'));
    $('#loc2').prop('disabled', (this.value == '0' || this.value == '1'));
    $('#loc3').prop('disabled', (this.value == '0' || this.value == '2' || this.value == '3'));
    $('#loc4').prop('disabled', (this.value == '4')); // 4 only ?
});
To scale values from Matlab's spectrogram to real range

To scale values from Matlab's spectrogram to real range


By : soda211
Date : March 29 2020, 07:55 AM
will help you The x-axis should be frequency. You need to know the sampling rate fs (is it 2 ?) of data. Then the frequency range will be (0:63)/64*fs
Actually you can get the frequency output in the spectrogram function:
code :
[B,F,T]=spectrogram(data,64,60,256,2);  % if fs = 2 in your case
how to plot spectrogram of a specific window in time domain out of the spectrogram of all signal?

how to plot spectrogram of a specific window in time domain out of the spectrogram of all signal?


By : hackerproff
Date : March 29 2020, 07:55 AM
like below fixes the issue I have produced spectrogram of a signal using matlab like this: , A simple way to do it would be to use xlim:
code :
xlim([1 1.5]);
xlim(T([900 920]));
Python spectrogram in 3D (like matlab's spectrogram function)

Python spectrogram in 3D (like matlab's spectrogram function)


By : Daniel Silva
Date : March 29 2020, 07:55 AM
I hope this helps you . My question is the following: , You just need to get your arrays in the right shape:
code :
fs = 11240.
t = 10
time = np.arange(fs*t) / fs
frequency = 1000.
mysignal = np.sin(2.0 * np.pi * frequency * time)

nperseg = 2**14
noverlap = 2**13
f, t, Sxx = signal.spectrogram(mysignal, fs, nperseg=nperseg,noverlap=noverlap)

myfilter = (f>800) & (f<1200)

f = f[myfilter]
Sxx = Sxx[myfilter, ...]

fig = plt.figure()
ax = fig.gca(projection='3d')

ax.plot_surface(f[:, None], t[None, :], 10.0*np.log10(Sxx), cmap=cm.coolwarm)
plt.show()
How can I plot the results of the spectrogram function?

How can I plot the results of the spectrogram function?


By : Coco Science
Date : March 29 2020, 07:55 AM
I hope this helps . You need to provide more input arguments into spectrogram. The form of the function you need is:
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