Non-negative data
Which of the following 2-dimensional arrays are examples of non-negative data?
- A tf-idf word-frequency array.
- An array daily stock market price movements (up and down), where each row represents a company.
- An array where rows are customers, columns are products and entries are 0 or 1, indicating whether a customer has purchased a product.
This exercise is part of the course
Unsupervised Learning in Python
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