Comments (4)
Thank you @FL33TW00D for your quick reply. I am indeed trying to use this for my research. I would need to dive deeper into the code (maybe re-implement it), although it seems there's no big reason as your Rust DTW package does a great job calculating the 1D output vectors using DTW.
I am interested myself in the ABIDE dataset and I was expecting I could use DTW to compare against Pearson's correlation coefficient calculations. If I use
i_lower
like this in the loop I am not getting a symmetric connectivity matrix as a result as I would expect (nregions x nregions
). Doesi_lower
need to be part of a for loop iteration? Not sure I get the 1D->2D conversion here.Considering this, it would be amazing if you could re-release a version of this notebook.
I will release a new version of the library and the notebook this weekend 👍🏻
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Hi @wizofe,
Apologies for this, seems the notebook is incomplete.
I no longer have this setup on my machine, but can give some quick guidance to unblock you. If you're using it for a project I'll find some time to release a new version to clean some things up.
The code you're referring to:
#Post processing them as per paper recommendations
for vec in dtw_output:
sym = np.zeros((n_regions, n_regions))
sym[i_lower] = vec
sym += sym.T
sym *= -1
StandardScaler().fit_transform(sym)
connectomes.append(sym_matrix_to_vec(sym))
This is transforming the 1D output vectors from rust-dtw
into a normalized 2D matrix, as per the original source code here: https://github.com/MRegina/DTW_for_fMRI/blob/master/Source.cpp#L89 . Therefore, i_lower
should be the indices of the lower triangular matrix, which you could generate like so:
i_lower = np.tril_indices(n_regions)
This should work, let me know if you have trouble.
from rustdtw.
Thank you @FL33TW00D for your quick reply. I am indeed trying to use this for my research. I would need to dive deeper into the code (maybe re-implement it), although it seems there's no big reason as your Rust DTW package does a great job calculating the 1D output vectors using DTW.
I am interested myself in the ABIDE dataset and I was expecting I could use DTW to compare against Pearson's correlation coefficient calculations. If I use i_lower
like this in the loop I am not getting a symmetric connectivity matrix as a result as I would expect (nregions x nregions
). Does i_lower
need to be part of a for loop iteration? Not sure I get the 1D->2D conversion here.
Considering this, it would be amazing if you could re-release a version of this notebook.
from rustdtw.
@FL33TW00D that would be amazing. Let me know when you do so! Thank you!
from rustdtw.
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