Dot Product
Vector Dot Product
An operation on two vectors returning a scalar equal to the sum of element-wise products, measuring alignment.
Détail technique
Dot Product calculations are a source of common errors: a price increase from $100 to $150 is a 50% increase, but returning from $150 to $100 is a 33.3% decrease. Percentage points differ from percentages: an interest rate moving from 2% to 3% is a 1 percentage point increase but a 50% relative increase. In computing, floating-point arithmetic can introduce rounding errors — JavaScript's 0.1 + 0.2 = 0.30000000000000004. Use integer arithmetic (cents, basis points) for financial calculations.
Exemple
``` Dot Product calculation: Input: value = 42 Apply dot product: result = f(42) Output: result ```
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