How to find the blob of maximum radius from [blobs_log, blobs_dog, and blobs_doh]

I was trying out this source code: Blob Detection — skimage v0.19.0.dev0 docs. I want to find the maximum radius DoG, LoG blobs from the set of given blobs

You can see in this bit of code:

    for blob in blobs:
        y, x, r = blob
        c = plt.Circle((x, y), r, color=color, linewidth=2, fill=False)

and in the blob_dog documentation
that the returned arrays have columns [coords, sigma]. So you can look at the sigmas to find the ones that are equal to the largest sigma in that column.

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