Index Ai Academy
Glossary · Phase 2 · Math, when you need it

Scalar

Also written: scalars

A single ordinary number, as opposed to a vector or a matrix.

Multiplying a vector by an ordinary number (mathematicians call it a scalar) multiplies every number inside it. Double a budget split [300, 100] across two channels and you get [600, 200]. Each channel doubles; the split between them stays the same.

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Drag a and b. The purple sum is where you end up if you follow a, then b.

Learn it properly

Vector arithmetic and length · Add, scale and measure vectors. About 25 minutes.

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