K Means Group Colours

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KF
KF on 28 Jan 2021
Commented: Adam Danz on 28 Jan 2021
Hi,
I have performed K-means cluser analysis on my images, and visualised the results using imagesc() function, and used a parula colourmap. Is there a way to know which colour has been assigned to each k-value? For example, I might want the k group of all the pixels that are coloured yellow, but I am not sure which k=x group the yellow refers to.
If I try to plot the average spectra of each k group, it is plotted using differing colours to what it used for the cluser images, which is frustrating. I am using ks of up to 20 so it's very hard to see what has been assigned to what easily!
Thanks in advance.
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Adam Danz
Adam Danz on 28 Jan 2021
Are you using the kmeans idx output to scale the color? Could you show us how you're using the kmeans outputs in imagesc?

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