Podcast
Questions and Answers
What does the signature matrix represent?
What does the signature matrix represent?
- Columns as minhash values and rows as sets
- Rows as minhash values and columns as sets
- Columns as sets and rows as minhash values (correct)
- Rows as sets and columns as minhash values
What should be consistent in assigning minhash values?
What should be consistent in assigning minhash values?
- Both a and b
- Number in the permuted order
- It doesn't matter (correct)
- Original number of the row
What does the expected similarity of two signatures equal to?
What does the expected similarity of two signatures equal to?
- The Jaccard similarity of the columns they represent (correct)
- The number of columns they have in common
- The total number of minhash functions
- The number of rows they match in
How does the text define the probability that h(C1) = h(C2)?
How does the text define the probability that h(C1) = h(C2)?
In the context of signatures, what does Jaccard similarity measure?
In the context of signatures, what does Jaccard similarity measure?
Why does it not matter whether the minhash value is the original row number or in permuted order?
Why does it not matter whether the minhash value is the original row number or in permuted order?
What is the formula provided in the text to calculate the probability of sharing a bucket?
What is the formula provided in the text to calculate the probability of sharing a bucket?
In the context of finding similar pairs with similar signatures, what is the significance of tuning 'b' and 'r'?
In the context of finding similar pairs with similar signatures, what is the significance of tuning 'b' and 'r'?
What does the value 's' represent in the given context?
What does the value 's' represent in the given context?
When finding similar pairs based on Jaccard similarity, what does it mean for 'all rows of a band' to be equal?
When finding similar pairs based on Jaccard similarity, what does it mean for 'all rows of a band' to be equal?
What was the real problem faced by the student who ran a MOOC based on CS246 in the fall?
What was the real problem faced by the student who ran a MOOC based on CS246 in the fall?
If a user wants to find almost all pairs with similar signatures but eliminate most pairs without similar signatures, what strategy should they adopt?
If a user wants to find almost all pairs with similar signatures but eliminate most pairs without similar signatures, what strategy should they adopt?
What is the formula for calculating Jaccard similarity between two sets?
What is the formula for calculating Jaccard similarity between two sets?
If two sets have 3 elements in common and a union of 8 elements, what is their Jaccard similarity?
If two sets have 3 elements in common and a union of 8 elements, what is their Jaccard similarity?
What is the warning given regarding constructing the matrix for Jaccard similarity calculations?
What is the warning given regarding constructing the matrix for Jaccard similarity calculations?
What does the minhash function h(C) represent in the context of Jaccard similarity?
What does the minhash function h(C) represent in the context of Jaccard similarity?
What does the formula Sim(C1, C2) = a/(a + b + c) represent?
What does the formula Sim(C1, C2) = a/(a + b + c) represent?
Why do we apply several randomly chosen permutations to create signatures for each column in Jaccard similarity calculations?
Why do we apply several randomly chosen permutations to create signatures for each column in Jaccard similarity calculations?
