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I tried the function pyroomacoustics.bss.auxiva.auxiva and got some results. But for one test signal, I got only nan in the result without getting any error while running the script. I don't know where the error could be, whether it is a bug or it's because of the signal.
Sometimes I got RuntimeWarning: invalid value encountered in sqrt W[:, s, :] /= np.sqrt(denom[:, :, 0]). But sometimes there is no warning, and the result was still nan.
Hi, I have to reopen this issue, because the reason was apparently not what I have found earlier. With other data, I experience this warning as well.
The correct reason is that in the function auxiva() in the script auxiva.py, WV has got nan first, after the line WV = np.matmul(W_hat, V) . If I have understood it right - please correct me if not - W_hat is initialized at the beginning and the value should not change, after the iterations have begun. But it changes anyway sometimes along the iterations. I looked into the code, there are variable assignments like
W = W_hat[:, :n_src, :]
J = W_hat[:, n_src:, :n_src]
In this case, if W or J change after the assignments, W_hat will be partially changed along. I not sure, if this is the way the codes are supposed to run. A simple example of unexpected change of a variable see here.
Codes to re-produce the warning:
import pyroomacoustics as pra
import numpy as np
iva_input = np.load("0th_iva_input.npy")
epoch_scvs, demix = pra.bss.auxiva(iva_input, n_src=iva_input.shape[-1], n_iter=20, proj_back=False, model='laplace',
init_eig=False, return_filters=True)
Because the warning does not happen in every run, one might have to run it several times.
datalw
changed the title
auxiva: Script did not show any error, but got nan in the result of source matrix
Bug in auxiva? Script did not show any error, but got nan in the result of source matrix
Apr 30, 2024
Hello,
I tried the function
pyroomacoustics.bss.auxiva.auxiva
and got some results. But for one test signal, I got onlynan
in the result without getting any error while running the script. I don't know where the error could be, whether it is a bug or it's because of the signal.Sometimes I got
RuntimeWarning: invalid value encountered in sqrt W[:, s, :] /= np.sqrt(denom[:, :, 0])
. But sometimes there is no warning, and the result was stillnan
.Could you help me with this? Thanks a lot!
The test signal in time-frequency presentation (ntime * n frequency band * nchannel) in .npy format is here: https://drive.google.com/file/d/1POObDnmY5ej5fdpeumS_PA0Ja8ZIb9W0/view?usp=sharing
Btw. I didn't use STFT, because I needed VMD to decomposite the signal. So in a sense, it is a time-frequency presentation.
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