Questions tagged [similarity]
288 questions
39
votes
4 answers
Applications and differences for Jaccard similarity and Cosine Similarity
Jaccard similarity and cosine similarity are two very common measurements while comparing item similarities. However, I am not very clear in what situation which one should be preferable than another.
Can somebody help clarify the differences of…
shihpeng
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9
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1 answer
Similarity measure based on multiple classes from a hierarchical taxonomy?
Could anyone recommend a good similarity measure for objects which have multiple classes, where each class is part of a hierarchy?
For example, let's say the classes look like:
1 Produce
1.1 Eggs
1.1.1 Duck eggs
1.1.2 Chicken eggs
1.2…
Dave Challis
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6
votes
2 answers
Calculating similarity where order matters
How can I calculate a similarity (coefficient) where the order of the items matters and something like the Jaccard index would not be useful.
Specifically, I'm interested in comparing ingredients. Take a simplified apple pie ingredient list, for…
James S
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6
votes
3 answers
Similarity measure for ordered binary vectors
I would like to ask your opinion on how to choose a similarity measure. I have a set of vectors of length N, each element of which can contain either 0 or 1. The vectors are actually ordered sequences, so the position of each element is important.…
GdA
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6
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1 answer
How to compute the Jaccard Similarity in this example? (Jaccard vs. Cosine)
I am trying to understand the difference between Jaccard and Cosine. However, there seem to be a disagreement in the answers provided in Applications and differences for Jaccard similarity and Cosine Similarity.
I am seeking if anyone could step me…
jkyh
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4
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1 answer
What is the difference between Latent and Explicit Semantic Analysis
I'm not quite sure what "latent" refers to in this context.
In Computing Semantic Relatedness using
Wikipedia-based Explicit Semantic Analysis they say
''Our semantic analysis is explicit in the sense that we manipulate
manifest concepts…
smatthewenglish
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1
vote
2 answers
similarity measure with two features
I have some question concern similarity measure
Suppose that we have a matrix M where M(i,j) is the similarity measure between user i and user j .
Each user is characterised by : id-user | country | id-artist | id-track
For this I choose to use…
user17241
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1
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2 answers
users' percentile similarity measure
Having n vectors of percentile ranks for a list of common users between group #1 and groups #2:n
e.g. vec1 = {0.25, 0.1, 0.8, 0.75, 0.5, 0.6}
vec2 = {0.35, 0.2, 0.6, 0.45, 0.2, 0.9}
The percentile ranks represent activity frequency within the…
Yuval Shachaf
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1
vote
0 answers
Looking for an algorithm that compute similarity between a phrase and possible combination of tokens
I want to find similarity between a phrase and possible combination of tokens that may form the phrase.
For example, phrase = 'sea surface water'
Possible token = ['sea','surface land', 'surface water']
My approach:
First, i generate combinations, c…
kitchenprinzessin
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1
vote
2 answers
Group similarity by high dimension vector comparison
I have a dataset of 256 rows with 61 columns/variables. Each row should be considered a vector of dimension 61. If I randomly split it, by rows, in 2 groups, how could I prove that the 2 groups are similar? The origin of the data is biomedical and…
RgrNormand
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I'm building a movie recommendation system based on genre, where the user will enter his choice and will receive recommendations based on his choice:
Column Name: "Genres" //This will contain the genres of movies
User genre: "Action Adventure"
I want to perform cosine similarity on this data, compare user genre with genres of different movies, sort and display the names of movies having similar…
Pratik
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