Questions tagged [spectral-clustering]
The spectral-clustering tag has no usage guidance.
7
questions
1
vote
0answers
43 views
Why kmeans cluster breakup is like this [closed]
I have a galaxy spectrum data set (total 22000). Similar to an electronic wave data, two dimensional (Flux vs Wavelength). A typical set of wavelength plot looks like below
Now I am doing kmeans on ...
1
vote
0answers
18 views
Ways of calculating the area of colored regions in a map
Background
I am a PHD student trying to improve my data science. One of my research projects, has me tasked with determining the size of the clusters in a colored image of regions. Here is an example ...
1
vote
1answer
20 views
Clusterize Spectrum
I have pandas table which contains data about different observations, each one was measured in different wavlength. These observsations are different than each other in the treatment they have gotten.
...
1
vote
0answers
13 views
Which version of spectral clustering in sklearn library?
Which version of spectral clustering is implemented in sklearn library? Is it Shi, Malik or Ng, Jordan, Weiss from this tutorial? In sklearn user guide, both versions are mentioned in reference. From ...
1
vote
1answer
29 views
How to use spectral clustering to predict?
In an academic paper, they talk about using a nearest neighbour algorithm to predict the cluster of a new point. And how the number of nearest neighbours is set to 10 in their example.
What do they ...
0
votes
0answers
20 views
Laplacian Matrix Has Negative Eigenvalues
I am trying to implement a simple version of spectral clustering using the normalized (random walk) Laplacian matrix in Python. After testing my function with a toy dataset, I found that my Laplacian ...
12
votes
1answer
131 views
What are practical differences between kernel k-means and spectral clustering?
I've been lately wondering about kernel k-means and spectral clustering algorithms and their differences.
I know that spectral clustering is a more broad term and different settings can affect the ...
