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Is that one is correct and the other is not? Or something of brit-english versus us-english? Can I use either?

When I use the Cambridge dictionary https://dictionary.cambridge.org/spellcheck/english/?q=datapoints together, it advises using with a hyphen!

A quick search on the web gives https://whatis.techtarget.com/definition/data-point with a space

I found other references that say that it's just an alternative spelling, but Grammarly doesn't agree with it. Is it wrong to spell datapoints?

  • you can send us your data points from any hook; or
  • you can send us your datapoints from any hook;

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  • No difference. Space is not audible, nor present, so it's a matter of local custom. Consult your correspondents and do what they do. – John Lawler Aug 13 at 18:19
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Both forms are alright, but data point is much more common.

Regarding dictionaries, Lexico (based off of Oxford Dictionaries) lists datapoint as its head entry; Cambridge has data point in its corpus but not the other. Merriam-Webster has neither.

In media, "data point" is far more common (262 results in the Corpus of Contemporary American English) than "datapoint" (13 results). Even with an international corpus like NOW (News on the Web) "data point" appears 3168 times compared to 155 for "datapoint." Even in JSTOR (an academic database), "datapoint" appears 584 times to "data point"'s 22,876 times.

So while data point is much more common, both are attested, so the choice comes down to individual or publication preference.

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I guess you can use either in any circumstances. But I guess data points is more correct.

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