PAMI is a Python library containing 100+ algorithms to discover useful patterns in various databases across multiple computing platforms. (Active)
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A sparse dataframe is basically a (non-sparse) matrix in which the first column represents the row-identifier/timestamp, the second column represents the item, and the third column represents the value of the corresponding item.
rowIdentifier/timestamp Item1 Value
A sparse dataframe generated from the customer purchase database is as follows:
| timestamp | Item | Value |
|---|---|---|
| 1 | Bread | 3 |
| 1 | Jam | 1 |
| 1 | Butter | 2 |
| 2 | Bread | 7 |
| 2 | Jam | 2 |
| … | … | … |