Automatically detect / suggest category

[radulucaciu]

Right now the user has to select the category for each transaction. We can improve this by automatically selecting a category.

Option 1: Select the last used category

Option 2: Use KNN to make an educated guess on which category to pick.
Ideally we'd want to use the following features:

• day of the month
• transaction value
• transaction type (income / expense)

However, there is a worry here that changing the category after the user has entered the value could be confusing (since the category would change). A solution would be to identify the category based on just day of the month and type, then, once the user adds the value, we can run the algo again and suggest a new category

[radulucaciu]

Going with KNN.

• We'll use https://www.npmjs.com/package/k.n.n
• Train on data for the past 6 months

For the purpose of this implementation, we'll ignore any optimizations, we'll go with a static value for k=3

For the scope of this exercise, we will not be running validation on this algorithm.