Learn when FILTER beats XLOOKUP, when it does not, and how to handle multiple matches, nth items, and multi-condition lookups with clear steps.

REDUCE allows you to iterate through your data, building your result step-by-step, in the same way a loop operates in a ...

The @ symbol can also appear in regular formulas outside of tables when Excel thinks you're trying to reference a single value from a range. If you see it pop up unexpectedly, it usually means Excel ...

Probabilistic models, such as hidden Markov models or Bayesian networks, are commonly used to model biological data. Much of their popularity can be attributed to the existence of efficient and robust ...

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Plays are written to be performed. A script is a written version of the play. Watch this clip to understand the basic structure of a play script. Narrator: Some stories are written for people to ...