Questions tagged [jaccard-coefficient]

Jaccard coefficient (or jaccard similarity) is a similarity function for computing the similarity between two sets

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1answer
347 views

What is the correct formula for Jaccard coefficient with integer vectors?

I understand the Jaccard index is the number of elements in common divided by the total number of distinct elements. But it seems to be some discrepancy or terminology confusion about Jaccard being ...
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0answers
14 views

Which string distance equation for fuzzy-matching person names is reliable?

A reproducible example with a small bit of R code is available in this stackoverflow post (link so I dont need to re-type out the code). The fuzzytext library in R ...
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0answers
19 views

Monotonicity of Jaccard and Dice in multilabel datasets

I understand that Jaccard and Dice follow a monotonic relation on binary datasets because the two are related as $J = {S \over {(2 - S)}}$, and I guess this would be the case when micro-average is ...
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0answers
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What is the state of the art/research metric to compare ellipses but jaccard coefficient?

Im looking for the, if there is one, metric to compare ellipses with each other. Last time a had a similar dataset (malaria cells, now its pupiles) i used jaccard coefficient but that was more because ...
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0answers
27 views

Metrics - multi-class model comparisons

I am looking for a way to quantify the performance of multi-class model labelers, and thus compare them. I want to account for the fact that some classes are ‘closer’ than others (for example a car is ...
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1answer
759 views

Jaccard similarity calculate similarity

It is not clear to me how to calculate similarity between two products from the example. How do they calculate that?
3
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1answer
2k views

Jaccard Similarity with Binary Data

I have 5400 rows of data and 3211 columns of attributes. The first 4 columns are ID/Name/ParentID/ObjectType - the rest of the 3207 columns are the attributes that are to be used for similarity ...
2
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1answer
40 views

When I would use a specific similarity coefficient over another?

Like using Jaccards over Dice. I want real examples, of when I would prefer to use Jaccards, Dice, Cosine or any other similarity coefficient.
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2answers
3k views

Similarity of search results using Jaccard

I have a set of search results with ranking position, keyword and URL. I want to make a distance matrix so I can cluster the keywords (or the URLs). One approach would be to take the first n URL ...
0
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1answer
227 views

Efficiently Sending Two Series to a Function For Strings with an application to String Matching (Dice Coefficient)

I am using a Dice Coefficient based function to calculate the similarity of two strings: ...
2
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2answers
4k views

Jaccard similarity between two items

Calculating similarity between two users is rather straightforward. Consider following example: ...
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1answer
1k views

Implementing Frequently bought together using a DB

We have a classic structure of an online shop database (products, customers, sales) and we want to implement a Frequently bought together feature. Our software is in ASP.NET and we do not know PHP to ...